Rejoining a match before shaders load crashes you immediately.

[spothydra]

I just crashed out of a match and tried to rejoin right away, I repeatedly crashed and it go so bad I had to reinstall the game. After reinstalling I was still crashing out but I realized that the shaders were loading on my second attempt. After waiting for that to load, I was able to get back in but my gun and abilities all failed to work until paradox shot me with her carbine.

Match ID: 28865225

 

[Lulz]

I've experienced this as well, although a different instance I realized I forgot to wait, but loaded in just fine. There may be some threshold you need to exceed in the loading process.