I do not have this - is it related to the micro editor? I don’t know.
Found this:
[Testing Update] 2025-03-26 - Kernels, GNOME 48, Mesa 25.0.2, Firefox, Grub, Plymouth - #3 by Ben
This is what I’d have done as well - kill the process and run the update again - before reboot attempt, because of course it will not boot when the update didn’t go through.
If this is related to this editor - remove it.
There are plenty of others - nano is present by default.