That is indeed annoying, it should reset after death. Reminds me of Ghost Recon Wildlands, you have to aim down sights to switch to switch to the underbarrel grenade launcher, that’s annoying. But then it stays switched even if you quit aiming down sights and run around for a while. Then next time you intend to fire your rifle, BOOM grenade danger close. Which shouldn’t happen, the grenade launcher in reality would have an entirely different trigger.