Why is Retransmission timeout reached on transmission on Cancel?

Question

Asterisk

Greetings.
I didn’t look into the logs for a particularly long time, but when I started to look into another problem, I came across a warning Retransmission timeout reached on transmission in the Aster logs, and only due to back calls, i.e. on calls that received CANCEL from the calling party. On successful calls, everything works correctly. On FreePBX servers 12.0.76.6 + Asterisk 11.7.0 10.11.14.13, on the second Oktell 2.15.5 10.11.14.12, both on the same network. The asterisk itself works as a VOIP gateway, passing the call on to an external provider, but judging by the Call-ID with the provider, everything works correctly.

Trunk settings

type=friend
host=10.11.14.12
dtmfmode=rfc2833
disallow=all
allow=ulaw&alaw
context=my-context-local
qualify=no

extensions

exten => s,1,NoOp(${CALLERID(num)})
exten => s,n,Dial(Local/705${MACRO_EXTEN:-10}@from-internal,,tT)
exten => s,n,Hangup()
exten => h,1,Set(CDR(userfield)=${CHANNEL(hangupsource)})

Example logs
[2021-09-15 14:48:36] WARNING[1626] chan_sip.c: Retransmission timeout reached on transmission [email protected] for seqno 1 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Ret...
Packet timed out after 32000ms with no response

SIP Dump

Googling experimented with
type=peer
canreinvite=no
insecure=invite,port
directmedia=no
( I really don’t understand why, because both servers are on the same network), but it didn’t help.