The server changes maps and the errors come back and i need to restart my game again. i restart my game and the errors are gone and fps is back to normal. I join my favourite server and the console gets spammed with all these errors and i get less than 80fps. Lets say i get around 250fps using the chromium 64 bit version when everything is running smoothly. The original version of the game doenst have this (or it might just not throw the errors in the console). or that is when the console doesnt get spammed with errors about missing textures, wrong vertex files or sprite shaders.
I always use this because it comes with quite a large boost in performance in general. So you can enable the chromium beta to have the 64 bit binaries.
