I have a file with 104 layouts, originally created in v5.5, last year converted to v12 and this year styled in v13.
I created a theme and styles for all of my UI layouts. Styles worked well for easily maintaining a consistent look throughout the layouts.
The problem is sometimes when in Layout Mode, I click something and the whole layout loses it's styles. The theme is still correct, but none of the objects have any style. I re-apply the styles and everything is OK, until it happens again. It has happened several times, on different layouts.