pfSense RADIUS authentication failing (timed out) and dumping core

gistfile1.txt

We have three offices with nearly identical pfSense configurations.  We have
VPN servers for clients to connect to and a local RADIUS server to provide
authentication for them.  On one of our pfSense boxes, it fails to
authenticate using the local RADIUS server.  It sends requests and
access-accept messages are returned.  However, the php-fpm process appears to
ignore the responses and then crashes.  Here is some truss output:

bind(9,{ AF_INET 0.0.0.0:0 },16)                 = 0 (0x0)
fcntl(9,F_GETFL,)                                = 2 (0x2)
fcntl(9,F_SETFL,O_RDWR|O_NONBLOCK)               = 0 (0x0)
sendto(9,"\^A\M-)\0\M-J\M-QM\^W\M-W\M-h7{L"...,202,0,{ AF_INET RADIUS:1812
},16) = 202 (0xca)
select(10,{ 9 },0x0,0x0,{ 5.000000 })            = 1 (0x1)
recvfrom(9,"\^B\M-)\0\M-t\rv\M-]O~\M-$}\M-4~"...,4096,MSG_WAITALL,{ AF_INET
RADIUS:1812 },0x820d022fc) = 244 (0xf4)
recvfrom(9,0x37bbc7deab51,4096,MSG_WAITALL,0x820d02300,0x820d022fc) ERR#35
'Resource temporarily unavailable'
select(10,{ 9 },0x0,0x0,{ 4.708796 })            = 0 (0x0)
sendto(9,"\^A\M-)\0\M-J\M-QM\^W\M-W\M-h7{L"...,202,0,{ AF_INET RADIUS:1812
},16) = 202 (0xca)
select(10,{ 9 },0x0,0x0,{ 5.000000 })            = 1 (0x1)
recvfrom(9,"\^B\M-)\0\M-t\M-d\M-V\M-l)x\M-^N"...,4096,MSG_WAITALL,{ AF_INET
RADIUS:1812 },0x820d022fc) = 244 (0xf4)
recvfrom(9,0x37bbc7deab51,4096,MSG_WAITALL,0x820d02300,0x820d022fc) ERR#35
'Resource temporarily unavailable'
select(10,{ 9 },0x0,0x0,{ 4.994004 })            = 0 (0x0)
sendto(9,"\^A\M-)\0\M-J\M-QM\^W\M-W\M-h7{L"...,202,0,{ AF_INET RADIUS:1812
},16) = 202 (0xca)
select(10,{ 9 },0x0,0x0,{ 5.000000 })            = 1 (0x1)
recvfrom(9,"\^B\M-)\0\M-tB+\M-a\^XzV\M-d$"...,4096,MSG_WAITALL,{ AF_INET
RADIUS:1812 },0x820d022fc) = 244 (0xf4)
recvfrom(9,0x37bbc7deab51,4096,MSG_WAITALL,0x820d02300,0x820d022fc) ERR#35
'Resource temporarily unavailable'
select(10,{ 9 },0x0,0x0,{ 4.993773 })            = 0 (0x0)
__sysctl("kern.hostname",2,0x820d022d0,0x820cfe1b8,0x0,0) = 0 (0x0)
getpid()                                         = 54452 (0xd4b4)
socket(PF_LOCAL,SOCK_DGRAM|SOCK_CLOEXEC,0)       = 10 (0xa)
getsockopt(10,SOL_SOCKET,SO_SNDBUF,0x820cfe160,0x820cfe15c) = 0 (0x0)
connect(10,{ AF_UNIX "/var/run/log" },106)       = 0 (0x0)
sendto(10,"<35>1 2024-12-12T14:14:40.588858"...,158,0,NULL,0) = 158 (0x9e)
SIGNAL 11 (SIGSEGV) code=SEGV_MAPERR trapno=12 addr=0x37bb6d8450f6
process killed, signal = 11 (core dumped)

The second recvfrom() ERR#35 calls are very strange as well.  We don't see
that with successful RADIUS calls to another RADIUS server:

bind(9,{ AF_INET 0.0.0.0:0 },16)                 = 0 (0x0)
fcntl(9,F_GETFL,)                                = 2 (0x2)
fcntl(9,F_SETFL,O_RDWR|O_NONBLOCK)               = 0 (0x0)
sendto(9,"\^A\M-7\0\M-J\M-S\M-^{BX1B\M^P"...,202,0,{ AF_INET RADIUS:1812 },16)
= 202 (0xca)
select(10,{ 9 },0x0,0x0,{ 5.000000 })            = 1 (0x1)
recvfrom(9,"\^B\M-7\0\M-tL\M-6`\M^T\M^V\M^L"...,4096,MSG_WAITALL,{ AF_INET
10.10.11.10:1812 },0x820d022fc) = 244 (0xf4)
close(9)                                         = 0 (0x0)

Interestingly, the other offices are able to use the RADIUS server in the
problem office to authenticate.  And the problem pfSense box is able to
authenticate using the RADIUS servers in the other offices.

I can't find any difference between the configuration of the RADIUS or the VPN
servers and am pretty stumped here.  Any ideas of things to check?