Andrew
There are a handful of us on here that had issues with migrating hem-o-lok clips following robotic surgery. The clips are routinely left in and should just settle in a corner somewhere and be no problem, occasionally they migrate into the urine system and can present the problems you describe. Reading your other posts you are quite active.
Our urology department set up a nurse led robot clinic that looked after us for two years post op, even five years later they still help out if I have issues, might be worth a phone call to urology.
You may be asked to complete a three day intake, output diary, where you record how much and what liquid you drink and how much urine you out put.
Certainly get some medical advice.
Thanks Chris