This is the direction I was thinking to.
Clearing cache and/or changing the version of the manager (0.42 to 0.43) doesn't change anything (incl. switching repo).
What's strange for me is the fact that the problem occurs on an rooted and an unrooted device.
And to make it more complex the unrooted one is the same as mine (Xiaomi Mi 9T, also not rooted, the one the manager is working on). Only difference is that one is running stock MIUI and my device is on xiaomi.eu with unlocked bootloader.
I will do some testing too.
Thanks!
While you are at it
From vanced manager settings
Delete keystore / logs / temporary files too.
(One of the steps I follow, Before repatching a new yt update)
Vanced manager 43 is bit buggy at the moment 42 should be okay for your explorations