share extension does not work

Hello,

I made an iOS application [in flutter] with an share extension (to share photos to my application, exemple of share extension : https://medium.com/@ales.musto/making-a-share-extension-that-accepts-text-and-urls-in-combination-with-coredata-swift-3-a0139c0f9800).

This works well with iOS simulator, with real iphone connected to Xcode. However, when I installed my application with AltStore, the application works well but the share extension does not. I do not know if the issue comes with AltStore or not, I am searching the origin. I can't reproduce the issue without AltStore. When I installed the application, I received a message to ask me if I want to keep or remove the extension (because It will count into my app limit). According this message, It may have a link with my issue.

Maybe AltStore succeed to install the application but does not have the permission to process the installation of the share extension on iOS ?

If you have any idea or feedback on this issue, you are welcome. I do not find an issue that speaks of this issue, maybe another people has met the problem. (I hope 🙏)

Have a nice day!

Edit:
iOS 14.6
Last version of AltStore

Start by reproducing the report on iOS 14.6 with an application built in Flutter and installed through AltStore, comparing it with the working Xcode installation. The issue is done when the installation path responsible for the share extension failure is identified and the result is documented.