Not sure if anyone else has run into this bug, but on mobile when in add record mob, if you are using a form with tabs, only the first tab will show (all the fields will still show, but the actual tab heading itself will be hidden).
If you make a silly rule, something like When Field A is not equal to "Impossible', then show Tab B, Show Tab C, Show Tab D, then all tabs will show.
Thought someone else may need this tip.
Additionally, be careful hiding tabs on mobile. Hiding a tab on mobile only hides the actual tab heading itself. It does NOT hide sections contained within it. You must hide everything separately.