I have the same problem, but support said me:
“After the cases of the filament were reported, we did some tests on that material. Unfortunately, the problem exists and this is a manufacturing error. We forwarded this issue to the filament supplier and send the filaments in the warehouse to them.
We changed the supplier and the new filament, Esun, is much easier to print.
Now, the filaments on the online store and packages are good ones.”
I check with PLA filament bought on web store and it’s fine.