edit: just so you are aware, i have shared the feedback on the change with the rest of the team - i don't think i made that clear in my original message (judging from the replies).
OK there seem to be 2 issues here:
- your image on the left is super outdated. we added the colour changes to these buttons back in 2019. this was due to feedback that the pass royale 'queue chest' button and the open now button were too similar a colour.
- you're right, i didn't put this in the patch notes. i did some digging and this change was committed to the build back on january 23rd and was missed due to it being from a long time ago (we have had optional updates since and it must have got missed somewhere)
we actually added this due to player feedback (yes, really!) here is even a recent example that demonstrates why we did this. i agree with the players there that it was a change that needed to happen.
although i don't think it would have stopped any of these accidental muscle reflex gem openings, it's my bad for not putting it into the patch notes, so apologies for that. all i would say as advice is to triple check what you're tapping in future - there are a lot of UI changes in this update!