Item data is missing from Approval task emails

[CrackerboxDave]

I'm modifying a multi-stage approval slow that's been working for a couple of years.

The approval task emails have been working fine until recently.  The email is formatted using markdown and should be showing the item's data presented using simple table formatting.

During my testing of the most recent changes I'm receiving the email with all the table formatting but the item data is missing.

The same approval task in the Teams Approvals app renders all the item data perfectly.

I have on occasion seen the item data flicker on screen immediately before the email fully renders but on final render the item data is missing.

I figure that there is some sort of security issue with the data but the target tenancy is the same tenancy that my device is secured to via Intune.  Additionally I see the same issue in Outlook Online and on my phone.

My security team advise no filtering being applied their end.

See attachments for screenshots