I had this bug, and for me it turned out to be my /tmp directory that is a tmpfs (to gain speed and save my ssd).
df /tmp gave tmpfs 3880480 2449036 1431444 95% /tmp
After removing junk from /tmp/ the system returned to normal.
Also in my case I had no swap, and sufficient free memory.
Would be interested to know if this works for you.
I had this bug, and for me it turned out to be my /tmp directory that
is a tmpfs (to gain speed and save my ssd).
df /tmp
gave
tmpfs 3880480 2449036 1431444 95% /tmp
After removing junk from /tmp/ the system returned to normal.
Also in my case I had no swap, and sufficient free memory.
Would be interested to know if this works for you.