Hi Glenn,
I do not use rPi's but .59 has been stable here on x64. I've had it running on 10m in the "lab" for about 2-3 days now. RF connects are only from me as I move around the house but include ax25, il2p, VARA, and ARDOP. I've staged it for use everywhere here after restarts.
73 de Rich WA3WLH