More loosely relates to these issues: MC-144009 MC-145821 MC-164001 MC-165403
The bug
If scroller.png is given a translucent texture, it will correctly render as translucent in most contexts. However, in the Telemetry Data menu, it renders completely opaque, which is notably inconsistent.
How to reproduce
Download and apply the attached resource pack
Navigate through menus that have a scroll bar
Go to the "Telemetry Data" menu
Expected results
All places that use the scroller would render it as translucent.
Actual results
Most do, but Telemetry Data has it as opaque for some reason.
Linked issues
relates to
Attachments
Comments

Affects 1.20.5 pre-release.