Board issue assignments not working when using filters to select assignee(s).

Summary

When on an issue board, selecting an issue and setting the assignee after filtering users from the side menu does not stick on subsequent assignments.

This happens when assigning a user to multiple issues on a board. You select the first issue, edit Assignee(s), filter for the user and select for assignment. On subsequent issues the filter persists (which is a nice behavior) and you select the user again to assign. Repeat this several times, the GUI shows all the right indicators that the assignments have been captured however nothing has been saved. Users then navigate away and don't realize only the first assignment took.

Steps to reproduce

1. Navigate to an issue board and select an issue to open up the side menu.
2. Select edit on Assignee and use the filter to identify a user. Select the user and click out to save.
3. Now select another issue, and edit on Assignee. The filter from the previous assignment is still in place, and selecting the filtered user will show them in the appropriate locations (the issue card gets their user icon, their name shows up in the Assignee(s) field, but a refresh of the page shows that the assignment didn't get saved.

• If you clear the filter, then filter again the assignment will work (persist after a page reload).

Example Project

none

What is the current bug behavior?

GUI shows that a user assignment is made / stored when it is not.

What is the expected correct behavior?

Issue assignments to actually be saved.

Relevant logs and/or screenshots

(Paste any relevant logs - please use code blocks (```) to format console output, logs, and code as it's tough to read otherwise.)

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:         Ubuntu 18.04
Proxy:          no
Current User:   git
Using RVM:      no
Ruby Version:   2.6.6p146
Gem Version:    2.7.10
Bundler Version:1.17.3
Rake Version:   12.3.3
Redis Version:  5.0.9
Git Version:    2.26.2
Sidekiq Version:5.2.7
Go Version:     unknown

GitLab information
Version:        13.0.3-ee
Revision:       d27df234886
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     11.6
URL:            https://...
HTTP Clone URL: https://.../some-group/some-project.git
SSH Clone URL:  git@...:some-group/some-project.git
Elasticsearch:  no
Geo:            no
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers: google_oauth2

GitLab Shell
Version:        13.2.0
Repository storage paths:
- default:      /var/opt/gitlab/git-data/repositories
GitLab Shell path:              /opt/gitlab/embedded/service/gitlab-shell
Git:            /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 13.2.0 ? ... OK (13.2.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Checking Reply by email ...
IMAP server credentials are correct? ... yes
Init.d configured correctly? ... skipped
MailRoom running? ... skipped
Checking Reply by email ... Finished
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
4/1 ... yes
4/4 ... yes
8/5 ... yes
10/7 ... yes
10/8 ... yes
10/9 ... yes
10/10 ... yes
10/11 ... yes
10/12 ... yes
10/13 ... yes
8/15 ... yes
8/18 ... yes
7/21 ... yes
7/22 ... yes
12/23 ... yes
12/25 ... yes
12/26 ... yes
4/27 ... yes
14/31 ... yes
12/32 ... yes
12/33 ... yes
6/34 ... yes
12/35 ... yes
12/36 ... yes
9/37 ... yes
12/38 ... yes
12/39 ... yes
25/40 ... yes
6/41 ... yes
7/43 ... yes
7/44 ... yes
9/45 ... yes
9/46 ... yes
31/47 ... yes
7/48 ... yes
4/49 ... yes
26/51 ... yes
32/52 ... yes
26/53 ... yes
34/54 ... yes
26/55 ... yes
32/56 ... yes
7/57 ... yes
7/58 ... yes
26/61 ... yes
7/68 ... yes
7/73 ... yes
26/74 ... yes
7/77 ... yes
7/103 ... yes
7/104 ... yes
7/106 ... yes
7/107 ... yes
20/109 ... yes
52/110 ... yes
54/111 ... yes
54/112 ... yes
67/113 ... yes
25/114 ... yes
70/116 ... yes
15/118 ... yes
25/120 ... yes
25/121 ... yes
7/122 ... yes
7/123 ... yes
71/124 ... yes
7/125 ... yes
75/126 ... yes
82/127 ... yes
121/128 ... yes
7/129 ... yes
75/130 ... yes
75/131 ... yes
83/132 ... yes
117/133 ... yes
117/134 ... yes
96/135 ... yes
88/137 ... yes
71/138 ... yes
71/139 ... yes
117/140 ... yes
88/141 ... yes
96/142 ... yes
118/143 ... yes
83/144 ... yes
117/145 ... yes
120/146 ... yes
7/147 ... yes
71/149 ... yes
71/151 ... yes
96/152 ... yes
7/153 ... yes
42/154 ... yes
42/155 ... yes
95/156 ... yes
95/157 ... yes
96/158 ... yes
119/159 ... yes
91/160 ... yes
96/161 ... yes
75/162 ... yes
81/163 ... yes
95/164 ... yes
95/165 ... yes
95/166 ... yes
99/167 ... yes
91/168 ... yes
96/169 ... yes
99/170 ... yes
75/171 ... yes
87/172 ... yes
104/173 ... yes
99/174 ... yes
118/175 ... yes
99/176 ... yes
71/177 ... yes
7/178 ... yes
15/179 ... yes
117/180 ... yes
91/181 ... yes
117/182 ... yes
99/183 ... yes
120/184 ... yes
81/185 ... yes
96/186 ... yes
117/187 ... yes
7/188 ... yes
116/190 ... yes
87/191 ... yes
117/192 ... yes
117/193 ... yes
121/194 ... yes
91/195 ... yes
95/196 ... yes
95/197 ... yes
81/198 ... yes
118/200 ... yes
11/201 ... yes
96/203 ... yes
121/204 ... yes
91/205 ... yes
91/206 ... yes
121/207 ... yes
99/208 ... yes
71/209 ... yes
121/210 ... yes
121/211 ... yes
81/212 ... yes
7/213 ... yes
Redis version >= 4.0.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.6)
Git version >= 2.22.0 ? ... yes (2.26.2)
Git user has default SSH configuration? ... yes
Active users: ... 42
Is authorized keys file accessible? ... yes
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... no
Try fixing it:
Please migrate all projects to hashed storage
as legacy storage is deprecated in 13.0 and support will be removed in 14.0.
For more information see:
doc/administration/repository_storage_types.md
Elasticsearch version 5.6 - 6.x? ... skipped (elasticsearch is disabled)
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)