Unable to Change Firemode When 'Change Firemode' Key set to Mouse Thumb Button

I have bound the 'Change Firemode' action to 'Alt' and 'Mouse 5' (Mouse 5 is a thumb button for my mouse, M65 Corsair). When I have the AKM out, and I press Mouse 5 to change firemode, it only changes the firemode if I have just spawned or if I have just fired the weapon, otherwise I have to mash the thumb button multiple times before it ever registers. If I press 'Alt' it works immediately. The odd thing is that for some weapons the Mouse 5 button works every time (without me needing to mash the button); for example the m16 will always change firemode immediately. Also the longer I have been alive the more times I need to mash the Mouse 5 button before it registers; If I have been alive for 20 seconds or so, it usually takes 2-3 presses of Mouse 5. If I have been alive for 10 minutes it might take 20-30 presses (lol)

This is not a hardware issue, I have had Mouse 5 bound to Change Firemode for RO2/RS1 for a long while. It has only not been working when I use AK47, AKM, etc. in RS2.

I only just now discovered that the 'Alt' key works. I had to bind it due to the Mouse 5 key being so unreliable to change firemode.

I documented this bug in a previous post but I did not know at the time that the 'Alt' binding works every time, it appears to be linked to it being a mouse button (https://forums.tripwireinteractive.c...3583-some-bugs)

Unable to Change Firemode When 'Change Firemode' Key set to Mouse Thumb Button