I noticed the same problem. I have a layout with button that calls a hidden combo box (the effect is nice) . But testing it on FM12 it stop working.
What is funny is that the function "Go to Object" still working in FM Go 12 for Ipad and Iphone but does not work in FM12 for desktop.
Even after updating to FM12 V2.
For me, it is clear that the FM12 has a bug that needs to be fixed.
While this may not work for every layout design, what happens if you use go to field instead of go to object?