The UI of the avatar lookup page in-game seems to have no constraint, it is completely bugged out depending the resolution, this includes the buttons for purchasing the items making the corners look blurry and super stretched:
1920x1080p
3440x1440p
Thank you for the bug report!
Regarding the second screenshot, the yellow and purple gradient present in some of the UI elements does not appear to be default Roblox behavior. Could you provide us with links to the experiences shown to further assist in our debugging efforts?
Thank you! 
The yellow and purple gradient in the second screenshot is actually just a custom texture pack, it isn’t the experience that does so.
