TLS Session Resumption with Proxy in Inner-Tunnel Not Working

[MERLE Pierrick (Chef de projet réseau) - SG/DNUM/MSP/DIS/GIR]

Hello FreeRADIUS community,

I am currently using FreeRADIUS 3.2.x as a RADIUS proxy to forward 
EAP-PEAP/MSCHAPv2 authentication requests to a backend Microsoft NPS 
server. The setup is working correctly, but I am facing an issue with 
TLS session resumption when using a proxy in the inner-tunnel: 
Attributes are never saved in the tls cache.

When I use this setup without any proxy at all, TLS session resumption 
just works as expected.

Is TLS session resumption supported when using FreeRADIUS as a proxy for 
the inner authentication?
If so, how can I properly cache the TLS session in this scenario?
Any guidance would be greatly appreciated. Thank you for your help!


Best regards,
Pierrick