[sr-dev] [kamailio/kamailio] topos breaks early-dialog update even on 5.6.0~rc0 (Issue #3112)

[George Diamantopoulos]

### Description

Topos still seems to break early-dialog UPDATEs in my configuration. This is on 5.6.0~rc0+bpo11.20220506004754.1 from 56-nightly which I believe includes c309122 and ceb688b. I haven't tested rc1 yet (there are no debs at this time) but there doesn't seem to be any topos-related commits since rc0 either.

### Troubleshooting

#### SIP Traffic

Attaching pcaps from a lab environment to demonstrate the problem. One with topos on (failure), one with off (success). There were no other configuration changes between these tests.

### Possible Solutions

Only turning topos off seems to resolve this for me.

### Additional Information

```
version: kamailio 5.6.0-rc0 (x86_64/linux) 
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown 
compiled with gcc 10.2.1
```

* **Operating System**:

```
Linux sbcprov0-stage-tis0-cn1 5.10.0-10-amd64 #1 SMP Debian 5.10.84-1 (2021-12-08) x86_64 GNU/Linux
```
[pcaps.tar.gz](https://github.com/kamailio/kamailio/files/8704222/pcaps.tar.gz)



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