Hi @okadots
Thanks for the bug report and sorry for the issue.
We have fixed a variety of JS bugs in 5.6.7 for both conditional logic and the tab field.
Please update to 5.6.7, hard refresh the page and test the issue.
If you problem persists, please export your field group to .json and attach to your next reply.
I’ll import it locally and figure out what is going wrong.
Cheers
Elliot
