When a segment is inserted automatically (102 %), I make changes inside the segment and continue work, the changed segments are marked with a green 102 % sign, although this is not correct (happening in Layout 6 here). When closing and reopening the project, the marks are gone.
Could these irritating and wrong marks in this case please be avoided?
Native or external project?
External, but this should not matter. It is CT that sets the mark.
Just as auto-propagation is reset between sessions for External projects, TM match marks may also be stored for the session only.
But that wans't the issue you have reported. I too would like a way to spot a TM match that has been edited (and an auto-propagated segment that was set to nP, but does not appear as such).