I've talked with other people playing bomblades and it seems it's a bug that happenes in same specific situation for us all. If you try to bomb a huge zerg of >40 people that is stacked together, you will be kicked out of the server for 'message spam'. You do your Soul Tether, proxy goes of, you see screen lit up with dmg numbers and after that it's instant blackscreen and spam message. It seems that game cannot differentiate between message and damage and just considers any action towards other player as to be counted towards 'message spam'.
This is just another instance of 'spam message' bug that happenes upon joining as 11th or 12th member of the group. My guess is that 11th and 12th members are doing some sort of 'handshackes' with other members that are uncessesery and exceed the limit. For example I often get notification in group that I invited myself to group but cannot accept is as I'm in a group... Game sees this as to many interaction and acts upon 'spam message' limit.
There is a simple fix - raise the spam message number limit by a lot. Seriousely I would rather get 1000 spam messages from other players than be kicked out of the Cyro after hours in que. I doubt you are able to fix your code when it comes to game being able to properly count what is a message and what is not as I haive no faith in your skills or will to do so, but simply fixing the constant number is rather in your capabilities, you would just have to care about players. Not to mention, that spam limit is probably only really needed on PC. On PS4 people are not writng scripts to spam others... C'mon.