I am also seeing this issue using Jupyter 4.4.0 - when I run one cell, sometimes all the cells above become blank - inducing mild panic - I am using Edge on Win 11. I have found that if I right click and undo cell operation, they re-appear (might help Sun_Bear as that’s a bit quicker than closing and reopening), but it is very disconcerting. Any update on this issue?
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I also see this in Jupyter 4.4, Chrome and Linux.
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Seeing this in 4.4 on Firefox/Windows. It is tricky to reproduce, but I’m adding gif reproducing it.
The disappeared cell typically comes back when I click on a nearby cell or something – in this gif it worked. But it isn’t 100% reliable. I do live coding demos for teaching – this makes it tricky 
I just started noticing it in the last month, but I haven’t tracked versioning.
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