I have added a Contact button on single product page but on clicking the button the ‘To’ field is not getting populate. I know it was working until the last update. I am not sure what went wrong. I have a similar button on the shop page which does populate the ‘To’ filed.
No. May be you had removed from wrong place.
I also changed some code which is not related to this. In your code you are showing only your vendors in directory, but your code was wrong, i just corrected that.