The scrollbar in the "Filter options" menu glitches out approximately 0.5 seconds after the menu is opened. It seems to originally load the long version of the scroll bar first, and then readjusts itself to fit the actual length of the menu.

Steps to reproduce:

1. Launch Minecraft Preview (1.21.30.24)
2. Navigate to Play Preview > Create from template > Owned by Me (#)
3. Click "Show All (#)"

Expected Result:

No visual glitch is shown, and scrollbar adjusts to its correct size when the moment it first appears.

Observed result:

Scrollbar briefly appears with the wrong size, then corrects itself to fit the menu.

Notes:

I produced this issue on a Windows 11 (23H2) computer with a max resolution of 1920x1080 (Windowed Mode) and with a GUI Scale of -1. Unfortunately, I cannot confirm if this issue is restricted to only that specific GUI scale.