Hello, I use the woodmart theme (compatible with the wc marketplace plugin), however there is a display problem at the buy button only for products published by sellers. The author of the theme told me to contact you to solve this problem.
See the screenshot below for a better understanding of the problem.
Could you please confirm if you are using our Vendor Vacation plugin?
Please share one admin, vendor and FTP account each for us to debug this issue. Make sure to mark the response as private while sharing the credentials.