Looking at hardware wallets for alt coins, read in a few places various hardware wallets have lost holdings upon recovery.

Maybe its FUD maybe its real, but assuming its real & not wallet theft how could this happen if the holdings are on the relevant blockchain?

I mean if i had a tangem or SafePal wallet for example with multiple coins, Kaspa, Render, beam, cardano etc.. and i had to reset the app or recover via seed option (avail now on tangem) would i get exactly the same amount of each coin back? if not where would they go?

Its an issue with these app based cold wallets, sooner or later you`ll get on a plane, walk up a mountain or just out of an internet reception area or the app will just freeze & need re-setting after a while so can these things be trusted long term?