Business Central 2019 wave 1 CU9 was shipped in February and it contains a small bug, which can cause some time consuming troubleshooting. Therefore this blog post.
Issue #859
https://github.com/microsoft/navcontainerhelper/issues/859 was the first place I saw this bug and normally I would just fix these bugs and assume that people would use the latest Docker image or the latest NavContainerHelper and automagically get the fix.