LiveContainer downloads stuck at 0 KB on Wi-Fi and barely works on cellular

I’m having a strange problem with LiveContainer on my iPhone.
When I open a source such as the Alan Gianctic repo and select an app to install (for example, Red Dead Redemption), the download window opens but stays at 0 KB / 0 KB and never starts when I’m connected to Wi-Fi.
The same thing happens if I use a direct URL/source inside LiveContainer.

Because I can’t always find the iPa’s of an app everytime on google or any website so I understood that you have to use repositories in source in livecontainer to get apps easily
However, if I turn off Wi-Fi and enable cellular data, the download starts. The problem is that the cellular download is very unstable. keeps changing, for example:

20 MB → 15 MB → 25 MB → 15 MB → 30 MB

and sometimes it seems to stop completely. Large downloads are therefore practically impossible because I don’t want to use all my mobile data.
I’ve attached a screenshot showing the 0 KB / 0 KB problem on Wi-Fi.
Why would LiveContainer work on cellular but not Wi-Fi? Is there a setting, DNS, network restriction, or LiveContainer setting I need to change to make downloads work normally over Wi-Fi?
Any help