No discernible difference from the first test.  Message gets through fine, all dkim tests passed, but reply (including reply all) goes straight to the original sender.

From: nico--- via Selenetest <selenetest@lochac.sca.org>
Sent: Wednesday, 9 April 2025 8:51 AM
To: selenetest@lochac.sca.org
Subject: [Selenetest] Test two, personalize set to 'individual'

The first test had personalize set to ‘full’.  The message that arrived at Gmail looks as if it was correctly understood for what it was – gmail parsed both the dkim headers from lochac.sca.org and from jeremygregson.com, and let it through.