Hey man, noticed you posted Proton review of Just Cause 3. I had the same problem and I think I figured out a fix. You have to run Just Cause using gamemode (utility that you have to install). After that you have to add launch option to the game in steam library:

LD_PRELOAD=$LD_PRELOAD:/usr/\$LIB/libgamemodeauto.so %command%

1. SUBRAYA EL TEXTO
2. PULSA CTRL+F.
3. PULSA 6.
4. DISFRUTA

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hola, tu nariz contra mi bola

Es un buen jugador, se merece un nova 1 seguro
sigue asi crac, eres un makina