That's because Mendix 10.6 has so many bugs that it's hard to keep up with them.
In addition to what you mention there are also problems with uploading files, the new expression editor, saving widget parameters, etc. 10.6 is one of the most problematic versions in a long time. I discover new bugs all the time ;)
And while it's been more than a week since the release of this version, so far Mendix is in no hurry to fix those issues. I know it's been Christmas and now the new year, but some bugs need to be fixed with urgency.
Anyway, we have to wait for Mendix to release version 10.6.1, which will hopefully solve some of the problems.
I see this in 10.5 too if I use the new style microflow editor
If you change back to the classic editor it all looks OK again
Liam, in the microflow editor you need to switch here: