Today, I transferred the site from one domain to another using the duplicator plugin. I did this for two websites and in both cases the custom font was broken on the new site.
I just went to the custom font section and re-selected the font file and the problem was solved.
I would guess that the custom font was still pointing to the old domain, and that’s why this was happening. So, I would say that URLs were not correctly rewritten during the transfer.
So if that was the case, I don’t think I could count this as a Bricks bug.
I’ve tried now to move the site with custom fonts with WPVivid, but the custom fonts were still working and were properly loaded from the new domain.
That’s why I think that this bug is on Duplicator.
If there is a possibility, you can try WPVivid, so that you confirm this on your install.