Tabs shows empty field. Doesn't work

Peter,
Do you mean chronologically, or sequentially?

Meaning, if I create a bunch of fields, THEN, add some tabs and move my fields around to group them, that won't work? Or are you just saying the very first row in the field set MUST be a tab?

Seems like the whole point of organizing the fields should allow some after thought and reorganization.

I'm adding tabs, putting fields below the tabs...some show up, some do not, some land in the correct tab, and some do not.

Are there any known conflicts with select or taxonomy fields?

https://drive.google.com/open?id=13P2dOg1sDIx8CDsPYc1x1hLHW1LxYvcv&usp=drive_fs

https://drive.google.com/open?id=13NLLt3GIpf2lQfNf33I5sL00xP14S1TA&usp=drive_fs

https://drive.google.com/open?id=13Mx1FOkhmk4cK9dI4kGn-RqUZ7zbg5z8&usp=drive_fs

https://drive.google.com/open?id=13LUR4StwLfF7luaSSpVMFfy9E5PmnDCm&usp=drive_fs

https://drive.google.com/open?id=13KwdWvZjvkNSmHauB7Onsu7t3ZBYGr_z&usp=drive_fs

Thanks Peter. In my first screen shot, the first field IS a tab, and yet, they don't work correctly per the subsequent screen shots. Some tabs are empty, and some fields don't show up at all, despite being located beneath a tab field. I will test this on another installation and see if I can repeat the issue and circle back with any info. Have a good day and thanks for the quick reply.