In 24w36a Java Edition changed to use actual textures for the tooltips, but the textures Java Edition uses are different from the Bedrock ones.
Bedrock tooltip ui\purpleBorder.png:
[media]
Java tooltip gui\sprites\tooltip\background.png & gui\sprites\tooltip\frame.png:
[media]
Attachments
Comments 4
[media][media][media]
Can confirm. The corner radius is inconsistent, and the background is not transparent. This also relates to MCPE-166098.
[media]