"lack of support"? Well I'm not sure what you mean I invest a huge amount of time, giving support^^
I'm not judging you or your free time... It's just a point to say. As a developer (like you), I've already started and developed applications alone that take out every free time we have and even then it is not enough. So it's hard to give support and test everything and then continue offering good LTS for every release... Support isn't only just saying "i'll take a look" and then just leave as it is (not saying you are doing that, but i've been posting real issues for the last two months and all of them had the same kind of reply with a total of 0 updates/fixes in-between that. I know it takes your time and your time is not cheap, so no criticism, just a statement).
" clients can't disconnect of change channel"
What are you tryign to explain?
I've no clue...
"cant hear other people in their channels"
"It's better if you provide us "reproduce", as well which TeaSpeak server version?
As well which client and which client version?
I really tryied to reproduce, but couldn't find a reprodutible way to do that. After I restarted the instance it fixed. The instance was running for 4 days straight without restarting with 21 instances with up to 1900 users. I had clients of all the 21 instances claiming the same issue. I can send you the same videos they sent me and also the same screen shots, but I couldn't really understand what were happening and I think that you might think the same.
I'm almost there converting all my TeaSpeak instances to a Tea*Speak server... After I convert everything I can send you the DB/log files so you can try to reproduce and fix on your end.
Server version: 1.4.4b
Client Version: Tea*Speak 3.0.18 - 3.3.0