@otislucy I have experienced the same issue.  even tried removing the sd card.  apparently the v2 is not the same hardware as the v1.  you'll notice there is no low res option and instead of 1080p it has 720p.  its like the deleted all the cool stuff between versions and now the v2 is basically trash.  If you also notice the connection to your nvr becomes incrdibly unstable after you open up the app to look at the cam.  its like they removed the second steam and added some adaptive streaming.  I personally wish i knew of this before buying my second 510.  for what its lacking they are charging way too much.

  @wbarber69 thanks for that.  Very disappointing from tp-link that it appears that they've removed functionality in the later V2 model.

I'd be interested to hear from tp-link if this is a permanent hardware restriction in the V2 models, or something that could be rectified with a firmware update.

Wonder if different models (e.g. C520WS) suffer similar restrictions?

Thanks.

  @Solla-topee 

the problem isn't that the stream cannot be setup and viewed from the nvr.  The problem is that when the camera does anything, like detect motion, it interrupts the feed and makes it unusable.  My nvr says the error is that the stream doesn't report its file size or some nonsense like that.  Couple that with the fact that I have zero issues from a V1 configured exactly the same way.  I have no Tapo care on these cameras.  And you are correct, if I try to open the app at all and view the camera or if the camera detects motion and sends me a notification through the app, the entire sub stream goes offline to my nvr.  I've even tried disabling and removing the sd card completely and it's no difference.  Like I've stated before, it's like there isn't even two streams available at all.  More like there's one stream that is dynamically changing its quality depending on how many users are viewing the same stream.  This one of 5 cameras.  They all function normally except for this one and only 510w V2.  All my other cams are V1. 
 

when I'm able to get back home I'll post my nvr logs to prove to you that this camera is completely  unreliable.  And the fact that there are multiple posts about this in your forums and this is your response proves that your tech guys didn't actually look into the issues as they've been reported. 

  @otislucy 

you may just be onto something or you may have just found yourself in the perfect case scenario that you camera worked for that one instance.  See I can do the same.  I can view the sub streams from my app or from my nvr at any time.  But when it comes to actually being able to record from the sub stream when the camera is actually detecting motion at the same time is still a no go.  That's the issue I'm having.  It seems like everything is setup and working but then I'm constantly being notified that my cameras are offline for extended periods of time.  Which what I am seeing is like I described.  Once the camera itself is doing any recording, it is dropping off from the nvr because even with my app closed, it can't do both sd recordings and anything else.  Which is completely contrary to everything support has tried to tell me on the matter.  Yes o can open the rtsp stream at anytime, but if it starts detecting motion then that feed becomes unstable and choppy and my nvr is reporting some issue about not receiving the rtsp file size from the stream.  

For me it definitely was just a network issue.

Further digging today found that I'd blocked the V2 device on the Deco mesh units (to force it to join the closer router).

This was then blocking it from any other device that connected via the Deco mesh units. (Hence I could see/stream it when I was directly connected to the router)

Luckily for me I haven't seen the issues you listed for your V2. I've been testing and watching RTSP stream (via VLC), Surveillance Station and the Tapo App all at the same time. The streams have not glitched even when the Tapo detects motion.

I hope you can get your V2 resolved as it's frustrating when you've got one device (the V1) that just works, and the other doesn't.

  @otislucy I'm having the same camera model and same issue and until now my camera does not detect my wifi. It happened to me several times now this year after the firmware update. But now it's getting worse. Do you have a solution already?