There’s an issue with offline mode, combined with one at a time interacton (which is default for mobile). If you have any validations and a validation is tripped the interaction gets stuck on a page showing the error but not the question that needs to be answered or re-answered.
For now just avoid using One at a Time interaction in your offline survey if it uses validation.
This is all fixed up by our wonderful engineers.
Please let us know if you are still running into issues!