I will. What I've been able to find out is that this might have something to do with GTM running in a JS sandbox.I haven't been able to debug it, which is a major issue. We need to be able to QA and test before pushing changes to tracking and events ...

Actively working on the same problem. Have you found any solution to this? We have the same setup with checkout.xxxx.com/checkouts/

Have you found a solution to this issue?The only thing I can think of is generating a random password for each signup.