I see strange things that I cant explain to myself...
So I do several (3+) requests at the same time (1-2 seconds). And those third and above (as I can see) requests do not shows even in "access log". Then some time passes and they appear... It may be 18 second or 206 or something else (especialy those numbers and idk why) according to when the request was sent and when it was taken here.
The problem appeared after some "global world problems" and inability to use the pythonanywhere at all (blocked). Then problem solved itself (idk), but this lag appeared.