Draft articles: seires numbers were deleted

We found out it happens when opening an drafted aricle an closing it without saving (because nothing was changed).

I’ll investigate this and try to replicate.

We were unable to reproduce this issue. It is possible there may be another plugin conflicting with how Organize Series works. Series Parts are saved as a custom field attached to posts. Do you have any plugins that hook into the WordPress custom field system?

no action for a couple of weeks. Marking this as resolved.