Single application (Element, Flatpak) missing min/max/close buttons, doesn't honor compositor settings

Just one application I use is showing weird compositor behavior. Configured buttons (max/min) and mouse actions (lower) are not being honored. But, all other apps seem fine. The offending app is Element, which is a flatpak-based app, but other flatpak apps don’t have this problem. Fully updated.

Screenshot-20230629155702-318x88

Anyone else seeing this?