This isn’t related to the 10.0.20 update - I noticed the issue before .20 came out.
In the Key Editor if I try to set the Quantize Preset to 1/8 it shows it as 1/4 instead of 1/8. It seems to only be related to the preset name that is shown (and what is checked in the list) because the grid-lines do change. Doesn’t happen in Project Window.
See attached animation