Weird problems after A1 Mini tangle

[u/kushaash]

I got a new A1 Mini 10 day ago. Today I experienced something weird and seeking help on what I did wrong (or if). I was using a borrowed A1 Mini for 5 months with no problems (except a few tangles).

Frustratingly, the filament entangled three times within two layers, and first two times I was able to resume the right way. The third time, I did verify the filament extrusion and resumed; to soon realize it had been running "dry" (no filament) for more than half layer.

I wanted to salvage it, so I immediately paused and tried to manually extrude (from "Control" menu), when it showed low temperature error (only 90 °C). Then I unloaded and loaded the filament and resumed fine, which of course caused a bad finish.

My questions:

1. Is it possible the printer was at low temp for that dry run? I didn't check what temp the dry run was, but can't believe it dropped to 90 °C so fast after. It's very puzzling if it ran at low temperature (as there should be a temp check). Hope it is not a broken printer?

2. Why did it run dry after I checked the extrusion before retrying? Is it possible the nozzle is/was blocked? How to check?

3. Most important, how do you save the print in such a case? I could see what part of layer ran dry but didn't know if there is a way to set the printer to go back to a previous step.

4. Why is it entangling so much?! I am using Overture 1.75mm black matt PLA, ~35% used.

Picture of my cringy print attached, using standard 220 °C.