Originally posted by Kevin B123
Hello and welcome to the forum

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It's a common problem as I understand it due to age.
Pentax Camera Repair Specialists - Typical Faults - Harrow Technical
A CLA service is the best advice I can give, unless others have sucessfully fixed theirs. You want reliability and a CLA should give you that back while also removing most of the age related failure modes IMO.
Has your camera got the silver rewind button on the bottom?
Thanks for the welcome. It's got a black rewind button on the bottom. I didn't spot my problem on that list you provided. Perhaps closest one is:
"Wind on lever has to be operated more than once to load shutter." - however mine never loads the shutter.
Keen to hear if anyone else has experienced the symptoms I described!