❗️Lightning Email Template Not Populating Merge Fields from Flow

Hey Trailblazers,

I’m facing an issue where merge fields like {{Case.CaseNumber}} in a Lightning Email Template are not populating when triggered via Flow (Send Email action).

1) Template is linked to the Case object.

2) Tried both {{Case.CaseNumber}} and {!Case.CaseNumber}.

3) Passed the Record Id and even used Get Records, but still blank.

Anyone else still facing this?  

Any fix or latest workaround from Salesforce?