Hello,
3v3 is known to cause connectivity problems with the game server. This happens most often with people that have a weak connection with the game server (not necessarily just people with a poor internet connection). We recommend trying a VPN to resolve this error. You may need to use multiple different VPNs, or multiple servers on a VPN to fix the error. If the problem persists, you c*so submit a ticket to see if the problem is with the server itself, though I have not heard of many/any others having this specific crashing issue, so it seems more likely to be a localized problem.

Here is the link to contact Customer Support.