Ok weird one (as always)
I think I just pee'd in spite of the catheter.
I was having a bowel movement which was significant but no splash. I have urine all around the tube where it becomes visible outside my body and running down it. Also the undeniable colouration in the water. I was that busy focussing on the other end I didn't pay any attention to urination as y'know that part always just takes care of itself in those times.
Wasn't until I cleaned myself I thought huh I shouldn't have had to clean there yet.
I did still have an addition to my bag (which I'd emptied, flushed and washed my hands before sitting ofc) but I'm guessing the catheter can only handle a certain level of flow then something stretches that little bit more to let me pee normally if my body demands it.
Didn't think that could happen but there we go.