This is an updated version of what I’ve already posted as a side note in a different context.
Example with the following find settings

Select line 2

Find “editor” in the selection → success

Select line 3 without triple-clicking or selecting multiple lines.

Note that EmEditor didn’t clear the old search range (blue background).
Find “editor” in the selection then finds in the old search range!?

EmEditor clears the old search range (blue background) when triple clicking or selecting more than one line.
To me it would make more sense when EmEditor would clear the old search range (blue background) as soon as one makes a new selection.