PnP intermittantly applying - SPO Content Types

[mhgoodwin]

First post, apologies if I am not clear.
We have built a site in SPO (Client Dev tenant) and used PnP to pull that site, settings, layouts and content types to deploy to a SPO Prod tenant (Client).

We are using Document sets, with a shared column of "Meeting Date" - that is supposed to inherit on all content inside the Document Set -

That Meeting Date column is used to calculate the YEAR as part of the build for views, etc in the Library.

Works here: (Original site, and ONE site that it did work on when deployed in Production)

Not here: (NEW site created in Dev to test, and on 3 other sites - totally different tenants, and one site in Production

We tested the same PowerShell on 7 other sites, 4 different tenants - it worked 3 times, and the other 4 times it did not.
We have copied the Content Types to Production, and pointed the Powershell to that location (in case it was an issue - and still isn't working as it should).
I am able to create a Library on the Production tenant, create a NEW Document Set Content type and use the site columns already there, and use the same settings - and it works

(NOTE: I am not a dev, I did not write the powershell / xml - but did build and test the SPO build.

Has anyone experienced this, or have any advice to troubleshoot?