Trouble w/ Redirects Forcing SSL on Mapping Plugin

Hello, I'm having trouble forcing SSL on site frontends via the Domain Mapping plugin. A couple days ago everything was working beautifully. Then I launched a new site, added it to the domain mapping, and the whole thing crashed. Un-forcing the SSL restored all the sites. But now when I attempt to force SSL on the frontends we get an endless redirect. The staff at Kinsta has tried working with it, but they haven't been able to find an answer. I've enabled support access, would someone mind taking a look please?