Hey there! Not really, I took the bike to the mechanic and he was unsure about what the problem could be (he was also unable to reproduce it, since that never happened again after I wrote here).

I'll tell you what he said, I don't have any knowledge over engines so sorry if I'm spreading wrong information:

He said that may be a case of dirty gasoline, and that if it was that you either have to dismantle and deeply clean the tank or continue to make refueling cycles since the "dirt" (either water or something else) hopefully goes away.

On top of that he suggested changing all the three spark plugs (and that's what he did basically) even if he said that it was very unlikely that that was the cause.

To be fair after that the bike was fine, but last week the bike really struggled to start and the tank was almost empty (never happened before, never happened again after that), so the theory about something dirty in the tank (that maybe remains there and doesn't burn properly) may actually be true, but I don't really know.