Hey wyotim I'm seeing the same behavior in our AzureSQL app, whereby the center justify pushes the text off to the right. Did you ever find an answer to this issue?
We don't use apps in browser, so it was in the Windows app. If memory serves, I am pretty sure it was happening in iOS and Android too.
*Edit: As you can probably tell from the original date of this thread, this was an issue a while back for me and I just applied my "fix" and moved on. I haven't do anything recently where this has come up again.
I have this same issue on a narrow text box when alignment is not left.
It's only an issue on the desktop client. It's a bug, for sure. I came here to report it, and found this thread.
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Features releasing from October 2020 through March 2021