I have had many problems with the Big Integer field type, but this one was particularly nasty. This was throwing no errors, and was not caught in the 'Analyze' in the Share Mobile Map window. The layers would be part of the MMPK, but red exclamation point and message 'Layer failed to load'. Removing the field after duplicating the field as another field type fixed it.
HI @StevenVanderploeg , have you been able to reproduce this with multiple MMPKs? What layer type(s) are a part of the problematic MMPK and which had the big integer field? What version of Field Maps and platform are you seeing this one? I will see if I can replicate this problem. Thanks!