Ok, since ATUM also is a stock handling plugin I can’t guarantee full compatibility (I’m not sure if ATUM does special things with the stock data) but there is an issue with our plugin in combination with AJAX requests from the wp-admin backend. I’m working on a solution and it looks like this also fixes the ATUM issue. I have to do some more tests, after that I will send you the new version.
Thank you again for your help.
After testing, the problem is solved.
About what you said “please note that when lowering stock with ATUM, the quantities of the expiry dates will not automatically be lowered. This needs to be done manually from the product page”
Does not write the quantity here
has nothing to do with what you said? https://prnt.sc/u8zj1l