The fact it happened at the same z location twice is telling.
Try a slim vase-mode print that reaches past that height and see if it happens again.
Comment on Any idea what might be going on with this print?
Leeks@lemmy.world 2 weeks ago
Either your slicer is failing: try shifting the object a little or rotating it and slicing it again.
Or your Z axis has something happening at that spot. Try cleaning and lubing it and see what happens when you jog through that spot a couple times.
DScratch@sh.itjust.works 2 weeks ago
HelloRoot@lemy.lol 2 weeks ago
I had a case that looked like that, because the nozzle was scraping the previous layer of the print.
I think that for some reason the layers below were physically taller than in softwas and the additive effect of that stacked and reached critical failure at a certain height. No enclosure/heating chamber btw. It was always the same height for that model, but then a smaller model like a benchie would have no issues on that height. I guess because the filament was warmer due to the smaller loops, so more mendible or less expanded somehow, idk.
I dried my filament so it stopped making bubbles and ran some filament specific calibration and also I changed the extrusion to be a bit lower. Then the issue was gone.