[SOLVED] Webrtc connection drops after 5 minutes on Apple devices (with coturn server)

I've setup a turn server for my WebRTC application. On Windows and Android, the application (and the turn server) works as expected. When I try the app on iOS or MacOS (currently only happening on Safari, and for some devices) the WebRTC connection works at the beginning, but after around 5 minutes it drops.

Here's the log from the turn server. The moment when the connection drops is around this line TLS/TCP socket buffer operation error (callback).

746: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1767, rb=1642473, sp=281, sb=45819
750: : session 001000000000000006: peer 192.168.100.100 lifetime updated: 300
750: : session 001000000000000006: realm <metasim.io> user <testname>: incoming packet CREATE_PERMISSION processed, success
750: : session 001000000000000006: peer 37.63.64.9 lifetime updated: 300
750: : session 001000000000000006: realm <metasim.io> user <testname>: incoming packet CREATE_PERMISSION processed, success
750: : session 000000000000000003: peer 10.154.0.14 lifetime updated: 300
750: : session 000000000000000003: realm <metasim.io> user <testname>: incoming packet CREATE_PERMISSION processed, success
750: : session 000000000000000003: peer 10.154.0.14 lifetime updated: 600
750: : session 000000000000000003: realm <metasim.io> user <testname>: incoming packet CHANNEL_BIND processed, success
750: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=285, rb=47449, sp=1765, sb=1642092
750: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1763, rb=1632229, sp=283, sb=46101
755: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=289, rb=47974, sp=1759, sb=1630876
755: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1759, rb=1621207, sp=289, sb=46818
759: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=285, rb=47375, sp=1763, sb=1645836
759: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1763, rb=1636011, sp=285, sb=46235
763: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=286, rb=47229, sp=1762, sb=1650592
763: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1762, rb=1640926, sp=286, sb=46085
767: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=286, rb=47549, sp=1762, sb=1641564
767: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1762, rb=1631749, sp=286, sb=46405
771: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=283, rb=47488, sp=1765, sb=1648212
771: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1765, rb=1638599, sp=283, sb=46356
775: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=279, rb=47039, sp=1769, sb=1649852
775: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1769, rb=1640051, sp=279, sb=45923
779: : session 000000000000000003: usage: realm=<metasim.io>, username=<testname>, rp=285, rb=47248, sp=1763, sb=1639700
779: : session 000000000000000003: peer usage: realm=<metasim.io>, username=<testname>, rp=1763, rb=1630019, sp=285, sb=46108
780: : session 001000000000000006: refreshed, realm=<metasim.io>, username=<testname>, lifetime=0, cipher=ECDHE-RSA-AES256-GCM-SHA384, method=TLSv1.2
780: : session 001000000000000006: realm <metasim.io> user <testname>: incoming packet REFRESH processed, success
780: : session 001000000000000006: TLS/TCP socket disconnected: 34.147.162.187:1090
780: : session 001000000000000006: usage: realm=<metasim.io>, username=<testname>, rp=8, rb=748, sp=8, sb=732
780: : session 001000000000000006: peer usage: realm=<metasim.io>, username=<testname>, rp=0, rb=0, sp=0, sb=0
780: : session 001000000000000006: closed (2nd stage), user <testname> realm <metasim.io> origin <>, local 0.0.0.0:3478, remote 34.147.162.187:1090, reason: TLS/TCP socket buffer operation error (callback)
780: : session 001000000000000006: delete: realm=<metasim.io>, username=<testname>
780: : session 001000000000000006: peer 37.63.64.9 deleted
780: : session 001000000000000006: peer 192.168.100.100 deleted

Here's also the turn.conf file:

# Realm settings
realm=<domain>

# Name
server-name=turnserver

fingerprint

# The TURN server IP address to be sent to external peers
external-ip=<ip>
listening-ip=0.0.0.0
listening-port=3478
min-port=10000
max-port=20000

# Validate credentials
lt-cred-mech
cli-password=<pass>

# Designate username and password
user=<user>:<pass>

# Certificate
cert=<path/to/certificate.crt>
pkey=<path/to/certificate.key>

# Logs
simple-log
verbose
log-file=/var/log/turn.log

# Possible fixes for 5-minutes bug, currently no success
#no-tlsv1
#no-tlsv1_1
#max-allocate-lifetime=36000
#permission-lifetime=36000
#stale-nonce=36000

This is a screenshot of Trickle ICE test of the turn server. Before I didn't had this error below (code=600), but either way the main problem was always there.

This is a list of things that we tried but were unsuccessful:

increasing different timeouts in the turn.conf (you can see them in the last comment of the configuration file)
starting the turn server with/without certificates
disabled other versions of tls except v3 as suggested here

Expected result: to have unlimited WebRTC connection with our app for all possible devices using a turn server. Actual result: connection drops after around 5 minutes for Apple devices.

Any help is greatly appreciated!