Teralyst hunting

[ChaosMarine]

I just had an Eidolon hunting session where it was so painful because the lures wouldn't follow, wouldn't pin the Teralysts even though we had four or five of them with at least three fully illuminated and one half illuminated, the Teralyst still teleported out. After slogging through four teleports, we get it down to it's last few seconds of it's health, we have two lures fully charged, one stops following and we have to keep making it follow and the other one, it just vanished. Has anyone else encountered this?