Network groups - group limits / reserved groups?

As soon as I call:

Network.SetSendingEnabled(32, false);

The client will disconnect from the server. Looks like its reserved for client-server communication…? Anyone knows?

I can disable 1-31 and 33-63 without problems (Didn’t disable 0 since I currently use it for my movement).

After some tests, it seems that EVERY multiple of 32 (tested 32,64,96,128) is reserved for unity communication. Disabling a group number which is a multiple of 32 will disconnect the game.

I’m afraid that this pattern means we only got the channels 0-31 available is this right?

Is there anything known about the group number limitations?

Edit: Looks like group 34 is the same as 2, so we only got 32 groups available then.

(This has been reported as bug because it is unexpected and undocumented.)

Any news about this?