Usually I find Giant Bomb lock most of their content behind a paywall, but their review of this is (https://www.giantbomb.com/reviews/far-cry-5-review/1900-781/) available for public consumption.

Far Cry 5 is, at times, very fidgety and glitchy. I ran into multiple quest-bearing NPCs who ran off mid-sentence and refused to activate again, forcing me to quit and restart. One such character was in the middle of telling me that he couldn't swim, then he got into an actively scared "there's an enemy nearby" state and immediately swam away. Pretty good form, too. One boss fight simply instructs you to kill the boss, so I pulled out my sniper rifle and smoked him. But he'll pop right back up, awkwardly, if you do it that way. You need to get up close so you can trigger a cutscene death. At one point in the game you're being constantly hunted by planes, but getting spotted by a plane doesn't activate enemies on the ground, so I was able to stealthily take over an outpost while also being bombarded and strafed from above. Characters flop around the environment, your AI helpers use their loud voices in stealth situations and sometimes use their stealth voices in open combat... while some of these glitches are funny and all, there are a few too many of them. They've been making these games for years, you'd figure some of this stuff would have been cleaned up a bit better by now.

AI helpers use their loud voices in stealth situations and sometimes use their stealth voices in open combat

If I wasn't confused before, I am now. Guess it's time to call CPU Solutions (the guys who built my PC for me) and start picking their brains because hell if I know what to do about what now. Thanks for your advice, guys. Sorry if my skull's too thick to understand a lot of it (though I believe a new GPU is probably going to be my next major expenditure. *sighs*).