diff --git a/Proton-FAQ.md b/Proton-FAQ.md
index 0314ce5..4ee7264 100644
--- a/Proton-FAQ.md
+++ b/Proton-FAQ.md
@@ -78,4 +78,7 @@ See [the DXVK README](https://github.com/doitsujin/dxvk/blob/master/README.md#hu
 
 # Enabling controller rumble support
 
-Proton does support controller rumble, however, the Steam for Linux client's Gamepad Configuration Support feature [does not support rumble](https://github.com/ValveSoftware/steam-for-linux/issues/4338). To work around this, disable Gamepad Configuration Support in the Steam client settings. If rumble still does not work, this may indicate a bug in Proton.
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+Proton does support controller rumble, however, the Steam for Linux client's Gamepad Configuration Support feature [does not support rumble](https://github.com/ValveSoftware/steam-for-linux/issues/4338). To work around this, disable Gamepad Configuration Support in the Steam client settings. If rumble still does not work, this may indicate a bug in Proton.
+
+# Proton exits with 'pid X != Y, skipping destruction..'
+Based on https://github.com/ValveSoftware/Proton/issues/131#issuecomment-415117673 this is generally harmless and is part of steam game startup procedure which is unrelated to Proton.
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