bugs.daz3d.com redirects to the support site, and you file a support ticket to the technical support folks, I think.
Or something like that. I’ve reported a few bugs, mostly crashers with the beta. Not sure if I’ve done it right, but it gets there eventually via the support report process.
If you can consistently reproduce it, that’s best. If it’s a ‘sometimes this happens’ thing, it’s really hard for them to prioritize it. (MPTNMI - Mysterious Problems Than Need Massive Investigations)