Alright so I have had this issue on and off for the past year, and I believe I finally have finally worked out how to reproduce it everytime.
When studying in Anki Mobile (latest app version; iOS latest; iPhone 12 Mini) I will sometimes come to a card that I do not know today, but think the answer is on the tip of my tongue, so I bury this card. This card’s note has 4 or 5 other cards, some of which are suspended (I have suspended all cards of a specific Card Template on these notes, because I do not wish to study them at this point). The next day, I will be presented with this suspended card of the note whose sibling I buried the day before, which come up first as I do new cards first.
Since this is mainly Geography cards that I bury, it can be very frustrating. I bury the “Where is this country?” card, thinking I will remember the name of the country tomorrow. Then tomorrow I am asked “What does the flag of Sierra Leone look like?” which I know is immediately a mistake as I do not do the Country->Flag cards, and then the country name is on my mind when I review (if I have not already worked out why that bad card showed up and know the answer now).
This only happens on Anki Mobile, not on desktop.
Any other info I can give, feel free and ask.