Debugging BLE connection issue with RN4678

[thepurplepig]

I have set up a ESP32-H2 (and also tried with S3) with the BLE uart example.
I can connect and exchange data using a BLE terminal app on iphone, however the point of this is to allow data exchange with a product that used the Microchip RN4678 bluetooth module.

When I try connect with the RN4678, I receive a partial connection string on the 4678 side and then it all locks up and nothing happens.

I'm just wondering if anyone else has used the RN4678 and encountered similar issues. I am not sure where I can try to make changes to see if I can get it working.