"This job has not been triggered yet" page stuck forever

Summary

Usually, after one stage of the pipeline finishes, the next stage would be automatically triggered. However, since last Friday, the next stage is not triggered after the first stage finishes.

Steps to reproduce

• go to Pipelines/Schedule section
• Press Play to trigger a pipeline

Example Project

https://gitlab.com/vfa-ambition/mlweb-main-frontend/

What is the current bug behavior?

A branch is merged to master. A pipeline of 2 stages is deployed. Stage 1 finishes but stage 2 stuck at pending state forever.

What is the expected correct behavior?

Stage 2 starts running after stage 1 finishes.

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

not applicable

Results of GitLab application Check

not applicable

Possible fixes

I am not sure how to fix it