Overriding squash commit message and commits dropdown is empty

Summary

More info, twitter thread: https://twitter.com/qoouep/status/1227882920771145729

There is a state in which these are empty.

Theory: it might have to do with MWPS & pipeline running state.

This issue is to capture more info in order to replicate the scenario.

Steps to reproduce

1. Create MR in a project that allows squashing and has a pipeline setup
2. Check the MR and try to override the message while the pipeline is running.
3. Check the text box and dropdown

Example Project

• < links appreciated >

What is the current bug behavior?

Empty

What is the expected correct behavior?

Text box should show the title of the MR. Dropdown should show list of commits.