Hi yeyeszozo
I apologize for any inconvenience caused. Please, could you be so kind to deactivate all the plugins except ATUM Free, Product Levels and check if the problem persists?
If it doesn't work, please, I have to ask you to open a private ticket. This is the link to open the private ticket: https://stockmanagementlabs.ticksy.com/
And remember to make a reference to this post.
Best Regards,
Andrea.