I apologize for any inconvenience caused.
I've just tested it on my staging site and it works fine for me, so unfortunately I wasn't able to reproduce the issue.
Said this, before keeping investigating I have to ask you to try this:
- Make sure that you have the last update of your ATUM add-ons and check if the problem persists.
- If you have and the problem persists try to deactivate all the plugins except ATUM add-ons and Wocommerce and check again. This is to confirm that there is no any incompatibility with any other plugin.
I await your feedback,