I’ve not commented on this thread thinking it would deteriorate very quickly into a “mines bigger than yours” thread, but it hasn’t. I am amazed.
Yes, as it happens I have encountered the problem. Long road rides for me which contain more a TT position on the bike for flat long sections. Get a bit of a twinge then if I don’t move around I get one. Invariably it goes within a few hundred meters if I shift my weight, but I know when it’s about to start now so move before it happens.
I just does happen, nothing to be worried nor poncy about it.