Viper Legionaire "Grappled" Condition never released

I am running in Bastille. Apparently I've been hit by Viper Legionaires and have the grappled condition. They continue to build up. I follow the chain attached to me to find the Legionaire that hit me, and it is no where to be found. I presume it is dead and it's "attachment" to me was never released on death.

Playing a Chaos DOT / Minion hybrid Lych.

STR:

1) Find a map with a bunch of Viper Legionaires
2) Let them hit you so that you have the Grappled condition (Icon is what looks like a spear head on a chain).
3) Once you've been grappled, kill them. Notice you're still grappled.

Expected: Death means I'm not grappled by them anymore
Observed: It appears that death does not remove their grapple on me. I continue to accrue grapples, and I am now as a result permanently slowed.

I am playing on a map that has Ice Patches on the ground. The lines trace back to ice patches, so I suspect the monster got killed and shattered because there's no corpse where the rope ends.

Bug Report ID: #411685325
I'm in the Vaal temple, and permanently have 3 stacks of grappled on me, although the monsters are long dead. (They did end up going away after I died, but with the xp loss, that's not a great solution.)