Step 1:
annotate an observation
Step 2:
Quickly switch observations using the green arrow
Step 3:
It should pull you back to the original observation that you annotated, but some of the Information form the other observation will remain.
i have had this happen when annotating and using the green arrow on individual observations (not the identify page). It happens when the annotation (or field, or addition to project, etc) hasn’t fully loaded up yet. When that happens it kind of jumbles the next observation and you need to hit reload to get it to display properly. It’s annoying, but is probably just a function of load times and i’m not sure iNat would be able to fix it.