Although it is not a PointFire issue, we wish to inform users of SharePoint 2019 that Microsoft has confirmed a serious issue in non-English modern sites after applying the September Cumulative Update of SharePoint 2019.  Several site components will have their text replaced with blanks.

The release notes for the September Cumulative Update have been updated to show this as a "known issue".

We recommend not installing this cumulative update, but waiting for one in which the issue is corrected.  More details can be found in this blog post from Microsoft Senior Escalation Enginee Stefan Gossner.

Update: You can download a fix for this problem https://support.microsoft.com/en-us/help/4461512/september-21-2020-update-for-sharepoint-server-2019-kb4461512