The right lock for the bonnet no longer rests

The right lock for the bonnet – see photo – no longer snaps in. The U-hook on the bonnet is then not pulled down according to purpose. You can see this malfunction on the bonnet, which stands a little above the fender. A former emergency aid no longer works. With it I could push the claw of the lock down by means of a powerful screwdriver until it snapped in. Then I pulled the unlocking handle. The claw opened and locked up accordingly again according to purpose. This emergency aid no longer works as described. I have the impression that compared to earlier less tension is on the unlocking handle. The grip actuation feels more smoo. The Bowden trains visible in the engine compartment to the left lock and to the right lock look o-k. Off and seem to be mounted correctly. What can be the reason that the right lock for the bonnet no longer snaps in? P.S. My experience with the Haynes Service & Repair Manual, however, is currently seen here repeatedly: The topic of the bonnet is not addressed in any way.