Hi there Joe,
Thanks for reaching out to us on this! I’ll help here…
Indeed this looks like a conflict! Testing to see if this is caused by the theme is actually pretty straightforward. Just follow the steps described in our Testing for conflicts guide, which basically are to switch to a WordPress default theme like TwentySixteen and re-check the issue. If the issue still shows up, de-activate all non tribe plugins and re-active them one-by-one (or in small batches), re-checking each time.
Please let me know about it,
Best,
Nico