I concur. I don't have either of the new companions, but I hear other peoples Zerith-var making a comment, as you say above, after a dolmen but I think i also heard him at the Auridon wayshrine in Vulkhel Guard.
I also hear multiples of him, if there are more than one.
'Sharp Arrows'Mr.Garlic
Hidden by darkness, a shadow in the night,A sped arrow dissecting the gloom,Finding it's target, such delight.
Still happening as of today. I don't even have Zerith-var unlocked, yet I can hear multiple instances of him despite having Bastian summoned. Setting companion comment frequency to minimal doesn't do anything to alleviate this issue.
This has been going on since they released. Hearing a bunch of Zerith-Vars fighting for quotes after every Dolmen is rough.
Tybalt Kaine Khajiit Nightblade Aldmeri Dominion
PC/NA
Guildmaster- Lucky Raven
Knight of Marrow - Blackfeather Academy
Adepti- The Witches Goblet
"Nightblade healer huh? How does that work?"
"I drain the blood of our enemies and fire it into you. It's a lot less messy than it sounds, and yeah I'm basically a Vampire without the whole AGH FIRE BAD"
I reported it via /bug last night too. With so many people doing dolmens for various golden pursuits it is much more obvious now. Not even Alik'r, I did a less popular route and hearing 2-4 Zerith-var's overlapping dialog is grating. I can't even hear my own companion over the noise.
I also noticed double text from Molag Bal's final words. Not sure if related. It looks like both the pre- and post-MQ words. I only hear one of them, though (the post-MQ message). It's also shown in the OP screenshot.