I went to camp for a long rest and it triggered a cutscene where he started sweating profusely and was in great physical pain before Lae'Zel started cursing at him in her alien language while pulled her dagger to his throat with several dialogue options that required rolls (I didn't bother since I have terrible luck) so I chose the one that said to let her slit your throat assuming it was some kind of test or the 'correct' dialogue option from the game devs.

However, she ACTUALLY slit my characters throat, killing him and didn't attack the party nor off herself (like she lied about doing in said dialogue before the assisted suicide/murder) and then after several seconds trying to talk to other party members like Karlach just said stuff like "Not now." when attempting to initiate conversation and then all of a sudden Wyll and Lae'Zel were aggro'd (towards both each other AND the rest of the part for some reason) while said remaining party members were still allied.

Used Scroll of Revivify on MC to bring him back and then killed Wyll and Lae'Zel, only to revive the former and ran out of scrolls for the latter.

Even more bizarrely, aside from her companion quest ending upon her character death NONE of the other party members have any new dialogue, let alone acknowledge what happened?

Also some lich-looking dude showed up by the campsite for like no reason?

Is this supposed to happen or is it some kind of bug?