Text cursor movement with arrow keys does not work in blueprint context menu if search query is empty

When using the text search in Blueprints the arrow key functionality is lost if there is a misspelling or when a search produces no results. This worked normally in 4.19 and below.

1. Open up a Blueprint
2. Rightclick the open space and type "custom"
3. Use the arrow keys to move the cursor from the right of custom to the left
4. This works as expected
5. Now fully delete the word custom
6. Type "cuis" to simulate a misspelling of the word
7. Try to use the arrow keys again to move to the left 

Result: The cursor will not move from its current position with arrow keys

Expected: The cursor should move with arrow keys regardless