In my previous flat I did hit that issue, after lubricating it the issues disappeared but the last few weeks before that I had to both jiggle the key and turn i

In my previous flat I did hit that issue, after lubricating it the issues disappeared but the last few weeks before that I had to both jiggle the key and turn it quite forcefully to get it to work (and getting the key in the keyway was its own challenge), on bad days 5s was actually lowballing it, I really feared I would be stuck outside once or twice.