Nextcloud Talk does not work after upgrade to 14.0.3

Hi,

we use Nextcloud Talk with a Coturn server (4.5.0.7), after we have upgraded the Nextcloud to 14.0.3, it does not work anymore.

In the browser the client sometimes just hangs, on iOS the Nextcoud Talk client shows “Waiting for … to join call…”.

Here are the logs from Coturn server:
68: handle_udp_packet: New UDP endpoint: local addr xx.xxx.xx.69:443, remote addr xx.xxx.xx.61:64150
68: session 007000000000000001: realm user <>: incoming packet BINDING processed, success
68: session 007000000000000001: realm user <>: incoming packet message processed, error 401: Unauthorized
68: IPv4. tcp or tls connected to: xx.xxx.xx.61:49667
68: session 004000000000000001: realm user <>: incoming packet message processed, error 401: Unauthorized
68: IPv4. Local relay addr: xx.xxx.xx.69:53807
68: session 007000000000000001: new, realm=, username=<1541154887:82JUtF7T0aTAea0S>, lifetime=600
68: session 007000000000000001: realm user <1541154887:82JUtF7T0aTAea0S>: incoming packet ALLOCATE processed, success
68: IPv4. Local relay addr: xx.xxx.xx.69:62185
68: session 004000000000000001: new, realm=, username=<1541154887:82JUtF7T0aTAea0S>, lifetime=600
68: session 004000000000000001: realm user <1541154887:82JUtF7T0aTAea0S>: incoming packet ALLOCATE processed, success
68: handle_udp_packet: New UDP endpoint: local addr xx.xxx.xx.69:443, remote addr 176.77.133.128:2918
68: session 000000000000000001: realm user <>: incoming packet BINDING processed, success
68: session 000000000000000001: realm user <>: incoming packet message processed, error 401: Unauthorized
68: IPv4. tcp or tls connected to: 176.77.133.128:2868
68: session 004000000000000002: realm user <>: incoming packet message processed, error 401: Unauthorized
68: IPv4. Local relay addr: xx.xxx.xx.69:49850
68: session 000000000000000001: new, realm=, username=<1541154887:82JUtF7T0aTAea0S>, lifetime=600
68: session 000000000000000001: realm user <1541154887:82JUtF7T0aTAea0S>: incoming packet ALLOCATE processed, success
68: IPv4. Local relay addr: xx.xxx.xx.69:63271
68: session 004000000000000002: new, realm=, username=<1541154887:82JUtF7T0aTAea0S>, lifetime=600
68: session 004000000000000002: realm user <1541154887:82JUtF7T0aTAea0S>: incoming packet ALLOCATE processed, success
71: handle_udp_packet: New UDP endpoint: local addr xx.xxx.xx.69:443, remote addr xx.xxx.xx.61:64366
71: session 000000000000000002: realm user <>: incoming packet message processed, error 401: Unauthorized
71: session 000000000000000002: realm user <>: incoming packet BINDING processed, success
71: IPv4. tcp or tls connected to: xx.xxx.xx.61:22139
71: session 006000000000000001: realm user <>: incoming packet message processed, error 401: Unauthorized
71: IPv4. Local relay addr: xx.xxx.xx.69:58672
71: session 000000000000000002: new, realm=, username=<1541154857:+FaohS3gJax15G8y>, lifetime=600
71: session 000000000000000002: realm user <1541154857:+FaohS3gJax15G8y>: incoming packet ALLOCATE processed, success
72: IPv4. Local relay addr: xx.xxx.xx.69:61766
72: session 006000000000000001: new, realm=, username=<1541154857:+FaohS3gJax15G8y>, lifetime=600
72: session 006000000000000001: realm user <1541154857:+FaohS3gJax15G8y>: incoming packet ALLOCATE processed, success

Do you have any idea?

Thank you!