The buried cards should be returned in the original deck and still being "buried". But in reality it isn't.
With the "Custom Study" deck:

After emptying the "Custom Study" deck:

I tried the same in the desktop Anki app,
With the "Custom Study" deck:

After emptying the "Custom Study" deck:

It seems the difference is that on Desktop Anki the "Custom Study" deck ignores the 4 buried cards (it contains 12 cards, vs 16 in AnkiDroid). When I empty it -- all 12 are returned to the original Deck. On AnkiDroid the 4 buried cards are returned but are left unburied in the original deck.
The criteria for the "Custom Study" deck are deck:"Langs::Slovenski" rated:1:1. That is, all the cards I failed that day in the Slovenski deck.
I tried this in 2.9.1:
AnkiDroid Version = 2.9.1
Android Version = 9
ACRA UUID = 1724f33f-bb39-4b76-bc63-a17f4b3bfea8
And 2.9.2:
AnkiDroid Version = 2.9.2
Android Version = 9
ACRA UUID = 32eca7e6-6055-4270-86d0-1e9c54e5bd58
Enter an [ x ] character to confirm the points below:
[x] I have read the support page and am reporting a bug or enhancement request specific to AnkiDroid
[x] I have checked the manual and the FAQ and could not find a solution to my issue
[x] I have searched for similar existing issues here and on the user forum
Hi there! Are using scheduler v1 or v2?
@mikehardy sorry, forgot to mention that. I use v2.
Hey @hssm - is something that the v2 scheduler code would handle differently than v1? Looks like the root cause is that creation of custom study decks isn't ignoring buried cards, based on the good testing from @tkrajina above
There's a bug in the computer version going in the opposite direction, so you may want to address that at the same time: https://github.com/ankitects/anki/commit/fe493e31c4d73ae2bbd0c4d8c6b835974c0e290c
Also, something to add here. Those 4 cards that are restored unburied -- were cards that I failed that day. So, I'd expect they really should have been part of the "Custom Study" deck. Like it really is in AnkiDroid (16 cards) but isn't in Anki Desktop (12 cards). I'm not sure if that ankitects/anki@fe493e3 fixes this problem or something else.
Ideally, I think the custom study here should have 16 cards, but emptying it should restore even buried cards to still be buried.
But, even a solution where custom study decks just ignore buried cards is better than the current situation - where I have to go through those 4 cards and bury them manually again.
Anyway, this is how I would expect it to behave. It's now up to you to decide :)
Hello 馃憢, this issue has been opened for more than 2 months with no activity on it. If the issue is still here, please keep in mind that we need community support and help to fix it! Just comment something like _still searching for solutions_ and if you found one, please open a pull request! You have 7 days until this gets closed automatically
This one is important and needs triage
I tried to reproduce this issue with the latest version, and seems it's fixed.
Closing it now. Thank you very much!
Thanks for the confirmation! Massive time-saver for us!
Likely fixed in 2d00fff26e2f2fc487d91019a686454d16029c7c (#6408)
Most helpful comment
I tried to reproduce this issue with the latest version, and seems it's fixed.
Closing it now. Thank you very much!