Well, I was that guy. As I mentioed before, there was likely only a narrow window of vulnerability and I took quite high doses, with I hoped, improved bioavailability. A week after the wart nick while shaving, I expereinced quite a significant dental bleed and waited nervously but it was fine. The other instance was probably a couple of years later with a small cut on the hand. And I would have forgotten about if I had thought at the time it was odd it was taking so long maybe half an hour, and then realised I had taken fisetin a day or two earlier. That instance wouldn't have been noteworthy without the prior one which took 3 hours but was extremely low in volume.
Now, these two events were quite unlikely and they could have easily not occurred and I would be in the "nothing to see hear" camp. And it hasn't been a regular problem with me, that aside I too have had many nicks and scratches with nothing ado. It would seem likely that if there is a problem then there is some homestatic responce, as is biology's way.
The other person to note a problem is lost69 who took sustained high doses over lengthy periods. A regular swimmer he picked up a skin infection and struggled to remove it with two course of anti-biotics, as I recall. That spooked him enough for him to quit the protocol.
It is quite clear that it isn't a huge problem given the failure to report many instances and fisetin's widespread use. But the two reporting it were dosing outliers and as I said they were events only few in number - it remains possible at least that a high doser might marry to the wrong circumstance. And if some delayed healing does occur amongst the masses taking fisetin then many might not attirbute it to fisetin - if I hadn't known the role of senescent cells can play in wound healing and past problems with senolytics, I may well not have paid enough attention, nor I doubt would have lost69.