As we all know these were moved to hold RB together with the reload button, but here is what makes using them feel incredibly clunky:
If you start pressing and then holding RB during an animation that doesn’t allow you to start up the chainsaw/bayonet/GL, such as a wall slide, a roadie run, a roll, or during a stun/stumble caused by melee, flash or anything else, nothing comes out, even if you still have RB pressed when said animation/stun animation ends.
The worst part is that when you let go of the RB button, it will trigger a reload, and there’s nothing you can do about it, if you try to use your alt-fire again, you will jam and be stuck in that animation.
EDIT: As pointed out by @Jimmeeehhhhh, the reload issue also happens if you try to activate the chainsaw when you’re in cover and you are not allowed to aim.
It is also worth noting that since around the start of OP 3, if you get interrupted while revving up a chainsaw, you will immediately start reloading once the stun ends. It wasn’t like this before, and I remember some patch notes around that time mentioning something about chainsaw rev-up mechanics being changed, it might be the cause of some issues.
Suggested fix: if you start pressing the chainsaw/bayonet/GL button during such animations, and keep it pressed, as soon as the animation ends you will engage the chainsaw/bayonet/GL, if you let it go during any of these, nothing comes out, not even a reload.
I know that the general issue has been reported multiple times, that the team is somewhat aware of it and that this is a long read, but simply saying that “sometimes using the chainsaw/bayonet/GL makes you jam a reload” wasn’t helping getting the it solved, so providing as much context as possible felt important.
I just hope that this gets to the team, took a decent amount of time to properly write it down