Hi Jack, Khamla’s link below to the known issue is the best information we have from Salesforce at the moment:
Salesforce has published this as a know issue here:
https://success.salesforce.com/issues_view?id=a1p3A000001SGShQAO
To help expedite a resolution, please mark yourself as affected in this link. Once we can confirm it is resolved, we will provide another update.
