[9.0 final, 9.0a RC1 and RC2] MRT: buttons bug

[MaxX]

1. Buttons [N] [+] [YMD] etc... are flickering on mouse cursor hover
2. [+] and [#] buttons stay unpressed or pressed (sometimes) when dropdown menu is shown (should stay pressed or not?)
3. [+] and [#] buttons stay unpressed or pressed (sometimes) when dropdown menu is closed (should become unpressed)

See my friend's video here (sorry for poor quality)
https://www.youtube.com/watch?v=6OcqUy9FSUQ
#2,#3 - before 00:45
#1 - after 00:45

Only x64 is affected. TC 32-bit works fine.

[ghisler(Author)]

Looks like a classic theme bug, I don't have this problem with Windows 7 default theme.

[MaxX]

2ghisler(Author)
I've just tested 8.52a. Flickering is present there too.
But [+] button actions in 9.0 looks strange.

[ghisler(Author)]

Sorry, I will postpone that to TC 9.01. It seems to be a redrawing problem with Lazarus compiler controls, not my own code.