I have this bug only after updating to 26.05. Many cards in my deck are cropped from the top, which is a problem because I can’t see the answer sometimes. Weird thing is that some of them do not have this problem while using the same template. This only happens on PC version (Windows 11 in my case). AnkiMobile and Ankidroid don’t have this bug.
Looks like a CSS layout issue. A quick fix is to increase the margin of the #concept element - replace the #concept styles in the Styling section with this (only margin is modified):
CSS/JS rendering differences is usually not something that Anki can fix because it’s handled by the different web engines used in the various platforms: Styling & HTML - Anki Manual