upload file selection looses items

Expected behaviour

within the gallery or files, select multiple files, share with nextcloud, nextcloud app opens,
you see the list of previously selected files

Actual behaviour

within the gallery or files, select multiple files, share with nextcloud, nextcloud app opens,
you see sometimes get an incomplete list of previously selected files. some items are somehow lost. so far only one item from many remained. maybe this is a pattern?

Steps to reproduce

within the gallery or files, select multiple files, share with nextcloud,

Reasoning or why should it be changed/implemented?

Either this is a bug of the IOS sharing dialog or a bug of the nextcloud app

iOS version

13.3.1

App version

2.25.9.2

Server configuration

Operating system:
Linux

Web server:
Apache

Database:
Postgres
PHP version:

Nextcloud version: (see Nextcloud admin page)
17.0.2

Start by reproducing the multi-file share flow from Gallery or Files on the reported iOS and app versions, comparing the selected files with the list shown after Nextcloud opens. Trace the handoff to determine whether the loss occurs in the iOS sharing dialog or the Nextcloud app; done means identifying and correcting the responsible component so all selected files are retained.