When you start typing terms for a search, I noticed there is a star icon next to that. However, when you try to hover over it to get a tooltip of what it does, it’s obstructed by the suggestion box for global search. You only see “Bookmark this”.
If you hit Esc at this point to try to close the overlay tooltip, the whole search is canceled.
On a side note, what is the + button next to the star? It has no tooltip and I never noticed it before. Perhaps it’s a PowerPack feature? But I never turned on any search-related items there.
If you do go ahead with a global search, the star is there again, though in a different place. This time a different portion of the tooltip is cut off, reading only “ark this search”.
This happens regardless of zoom level or window size for me.
macOS 10.14.6, MS Edge 79.0.309.71