LearnDash Problems

Is anyone else having problems with LearnDash?
I’ve built a site for a client and it generally runs ok. But course progress doesn’t seem to being saved properly and “Date of last activity” isn’t being shown. I was guessing it might be a problem with Breeze.
But disabling that seems to have no effect. I’m also using Divi. But I can’t see how that should cause a conflict.
This is driving me nuts!!