Comment 17 for bug 1769981

> https://errors.ubuntu.com/oops/93aef40e-5deb-11e8-945f-fa163e8d4bab (most recent)
> https://errors.ubuntu.com/oops/c9e22fbe-58dc-11e8-9127-fa163ed44aae
> https://errors.ubuntu.com/oops/385a60b4-334f-11e8-a211-fa163ef911dc
are all bug 1731261

> https://errors.ubuntu.com/oops/8fd0adc2-334e-11e8-b7c3-fa163e8d4bab
is bug 1748450 (fixed already, a few weeks after your crash report)

So this seems to be related to bug 1731261. Although we also seem to be missing any indication of what is triggered that for you.

Actually I'm starting to think your freezes are not related to any crashes. It sounds like your freezes are more frequent and less fatal than the above crashes would be.