Expedition is way too buggy and bugs have gotten very tiring

Hi there just want to offer some feedback.

I have been running expeditions as it's fairly enjoyable to me but the bugs have legit soured my experience fully by now. I am running a crossbow bleed bloodmage and I encounter often this bug with a rare that takes damage only by killing the minions it spawns. The problem is that I often end up with killing everything but the rare is immortal. I cannot kill it and I cannot find the last monster it supposedly has, I tried to trouble shoot by inviting friends with full screen send off screen coverage builds line spark and we couldn't fight the immortal rare or find it's minions. It's been very frustrating. I literally lost 4 expeditions in a row to this bug. Please fix GGG it was your main mechanic this league.