Thank you for your post, and I apologize for the late reply.
Can you provide any more detail on this freezing? For example, does the freezing only occur with this one database file? How many fields appear on the Layout? What objects do you have on the Layout (background images, text blocks, rectangles, etc.)? If you create a new database file and enter data, do you also have the same problem? Have you tried reinstalling FileMaker Go?
I realize more than two months have passed since your posting, so if you have found a resolution, please post here so others with similar symptoms can benefit.