This is a little hard to explain but I will try my best. Sometimes it will switch my weapons/inventory at random. Examples are:
I am in a fire fight I get behind cover and throw down some med packs, I switch back to my primary, peak to get back into the fight and it will switch back to my med packs or sometimes even defibs.
I just got finished fighting and I jump over to the incapped body, pull out my knife to finish the deed and it switches to my primary or sometimes even med packs/defibs.
In a firefight I run out of ammo with my primary - switch to secondary and it will switch back to my empty primary.
It makes it a little hard to explain because it is random. It will not always do it and I haven’t found a way to replicate it all of the time. It also will not always switch back to the ‘previous’ weapon, it sometimes will switch to defib/knife/something random. Something that wasn’t used previously in that time span.
Also it rarely happens (And hasn’t happened at all since the last patch but I will throw it in here anyway) but I sometimes will get stuck in one motion. Say I am walking backwards and to the left, it may get stuck in that position. So no matter what key presses I hit I am still going backwards and to the left. I have to either hit ESC and go into a menu or double tap the backwards key. This issue may be something on my end but this is the only game I have experienced this with.
Things to note:
I use keybindings to switch my weapons. I do not use the mousewheel.
The keyboard I use is a Thermal Take eSports Meka.
My keybindings are:
Arrows for movement
Right Shift for sprint
Numpad keys for weapons/inventory
numpad 1 for primary
numpad 2 for secondary
numpad 3 for knife
numpad 5 for med packs
numpad 6 for defibs
Right Mouse for jump
Thumb Mouse Button 2 also defibs