Waves UI not updating correctly

There is an issue with the Waves plugins not updating the top of their UI anymore.

It happened between changes b5afccc37c351caa95791568259b253d85628c7f and de855f0b359956d08ef9d852d2d00aad32b73cf7

Here are before and after examples, can be reproduced in plugin host. Any idea what happened, can be seen in these gifs:

How do you search github for a commit hash?

Rail

https://github.com/WeAreROLI/JUCE/commit/<commit_hash> shows the commit.
https://github.com/WeAreROLI/JUCE/commits/<commit_hash> show the history until that commit.

Or in your local copy:

git diff <hash>^ <hash>

i.e.

git diff b5afccc37c351caa95791568259b253d85628c7f^ b5afccc37c351caa95791568259b253d85628c7f

works also:

git show <hash>

and history:

git log b5afccc37c351caa95791568259b253d85628c7f