OK – well the next step is probably to run through standard troubleshooting procedures and switch to a default theme and turn off all other plugins except, in this case, WooCommerce, and see if the same thing still occurs.
Assuming it does not, start reactivating everything and test at each stage to see if the problem has returned: this should hopefully isolate whatever is conflicting.
With that said, it’s really sounding like something strictly on the WooCommerce side of life (or at least something that is conflicting with their plugin specifically, rather than relating to WooCommerce Tickets) and so it may be best to seek further help from the Woo team if the above doesn’t help.