Local availability copying doesnt work on deeper nested folders (>2 subfolder levels)

Steps to reproduce

1. Have Nextcloud store some files in a deep directory structure, where the main folder F1 has a subfolder SF2 and within this there is another subfolder SF3 and again in SF3 there is a subfolder SF4 which contains a file, e.g. TEST.TXT
2. Mark F1 as "offline available"

Expected behaviour

F1 and anything below it should get the green marker and all content should recurseively be downloaded locally

Actual behaviour

F1 gets the green marker (none of the stuff below it). Nothing gets actually downloaded.

Counterpoint:
This does work fine with up to 2 subfolder levels below the level where the users marks a node for local availability. So if the user in the above example marks SF2 for local download that does work.
I did notice this when I tried to make a cryptomator vault locally available. Cryptomator vaults have a lot of nested folders.

iOS version: 26.3.1

Nextcloud iOS app version: 33.0.3.7

Server operating system: Raspberry Pi OS Trixie

Web server: Apache

Database:

PHP version: 8.2

Nextcloud version: 32.0.6

Start by reproducing the issue in the Nextcloud iOS app with a folder containing more than two nested subfolder levels, using the reported versions where possible. Trace the local-availability recursion from marking F1 offline available; done means every descendant receives the green marker and is downloaded locally, while the existing behavior for shallower folders remains intact.