Reaction applies twice

Summary

Merge request reaction applies twice

Steps to reproduce

1. Poor connection
2. Hit reaction
3. It wont appear for 2-3 secs
4. Reload the page
5. One reaction applied, but it is not you
6. Hit reaction again
7. It is applied twice

What is the current bug behavior?

Reaction applied twice

What is the expected correct behavior?

Reaction applied once

Relevant logs and/or screenshots

From my side:

From others side:

Gitlab CE version: 11.10.1