For the sake of form, refer to: How to manually update apps on your Apple device - Apple Support
"You can turn off automatic updates and update apps manually. Or you can turn on automatic updates so that you don't need to manually update each app." With instructions in the support article on how to do that.
However, it sounds like you have that set, in which case ask Apple about this issue:
Refer to this document for ways to contact Apple --> Choose your country or region - Official Apple Support
Select your country (also look for "other" regions), then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service by telephone --> Contact Apple for support and service - Apple Support