[2022] VOID please fix vanilla players joing modded lobby midgame

Hello, as you might already know, u can play modded version of the game and allow vanilla players to join (u just have to disable server side checksum in options). Unfortunately there is a weird glitch that happens midgame, let me explain:

Let's say we are playing a modded lobby and we have 3 people out of 5, we start the mission and just have fun with our mods (only host has them installed). After a few minutes u can see a lot of people joining in and then logging out shortly after, the game prob does not realise that we are already playing and it tries to add new players to the lobby.

I have reached out to one of the players affected by this and he told me that he was playing a vanilla game and just clicked to join a server, no mods installed and he had enabled server side checksum in the options.

When he joined our lobby while we were already playing he just saw a black screen and a 100% progress bar that got stuck for eternity, he could talk to us via voice chat tho.

Void please fix this issue as it might affect the gameplay of a normal non modded player that just tries to join a random game.