Welp. Decided to test for lols how restarting the game to force interruption works.

Did close to 100 clears which I reset the moment the event girl dies not dropping a sphere/drop. Not a single drop. Two possibilities - my luck just sucks so much that in 100 runs I got zero drops at level 74 of dojo. Or game is "inteligent" in a manner that it actually determines drops before you even kill stuff and remembers that for sake of restarting after interrupt. This could explain why if I restart after girl dies without drop, I don't see any drops for 100 retries.

So just stamina runs for me. Hope I get few drops I need to get 5* variant so I can get back to my previous faster 35 stamina/25 stamina map running vs spamming this 12 stamina one.