Bugs in puzzles' statisics

I put a very difficult problem aside (no move), then picked it up again and solved it, but when I looked at my puzzle score history, I noticed it had taken points away from me, as if I'd failed. Why?

Your recent puzzle history includes a couple of failed puzzles with MY TIME = 1:00:00, perhaps this is some time limit per puzzle, who knows...

How about participating in the Olympics instead of wasting yourself giving such smart comments...? Maybe you pay subscriptions and are happy, but I've never seen such a ramshackle site, especially in terms of responsiveness—even giving this answer it returns layout and functionality bug... and luckily it's been around for twenty years!

Other times I'd interrupt it due to sleep or other reasons, and then, once it was resolved, it would give me points. Sometimes it would mark me as having lasted for over an hour because the browser had been left in the background with the smartphone in standby, so it can't be what you say. Also, this is the first time it's happened to me—the other ones you see in red were actually incorrect. For me, it's a glitch.

They just keep changing things quietly so I would not be surprised if they added the limit recently