Despair Demons Causing Rifts to Glitch
I've tried tackling the rift on the river near Redcliffe farm (Hinterlands) for about an hour now. Normally it spawns 1-2 despair demons and 1-2 greater terrors; the terrors are no problem, but the despair demons continuously flee from my characters, and seem to break the rift. Cassandra's chased them as far as Redcliffe Farmlands on one side and the Gulley of Burnt Men on the other, despite using Hold Position commands to try and keep my party within the area of the rift. But sooner or later the despair demon teleports so far away that the rift glitches; the red progress bar disappears, the demon(s) disappear, and the rift cannot be interacted with. It still makes the sounds and green summoning circles appear, with occasional red circles, but nothing happens.
Also, the option to 'Disrupt Rift' doesn't always appear during the fights, despite thorough searching of the ground beneath the rift. Leave the game alone for 10 minutes or so and the rift spawns three black Mabari type creatures on top of the waterfall (I can't look up their names, because the tac cam can't scroll up the waterfall, but that's a glitch for another day.)
Has anybody else seen anything like this?