Here is some additional info that may be helpful:
AnkiMobile version 24.04
Anki PC version 23.12.1
FSRS is enabled and all learning steps are the same across devices.
Below is an example of why this is a big problem. I answered the card again today and the interval was drastically different (1.63 months vs 2.47 months) than it was 2 days ago when I answered it correctly.