Thank you for your post!
I was unable to reproduce this behavior with a New File hosted on FileMaker Server 15.0.1 while using Chrome 51.0.2704.81 running on Android 5.1.1. To attempt to reproduce:
1. Created test.fmp12
2. Created a Tab Object (with two tabs)
3. Created a Text Field "Field" and placed it in a tab
-Tested without changing the formatting of the Object in the Enlightened them, but could reproduce
4. So, I changed the Tab Object to be Solid Red when Active and Transparent when Inactive
-Still couldn't reproduce
If you could provide some more information:
-What is the Theme of your layout?
-Does this happen to you in a new file?
-What version of Android are you running?
I look forward to your response!
Indeed there are no problems with new or 'younger' files.
Strange thing is that it occurs after updating to FMserver 15. Maybe some costum styling interferes with the field. In the same solution a problem occurred with a portal on tab elements. First the portal is filled with records but after creating a related record the portal is empty. After I dragged the portal of the tab element it worked fine again. I'll digg-in deeper to see if I can find something..
Hopefully this isn't the case though.
Edit: Oh! You might see if you are using Classic Themes as well. They are deprecated and have been removed. I could certainly see that being a problem too!