3 of those, and 

1. Version (OS Build 26100.2454)

2. Start11 V2.11

3. StarAllBack

4. They do go away

It seems that they multiply every time the computer goes to sleep.

StartAllBack is much more stable and has features that Start11 doesn't have.

And I find it strange that there is no formal customer support.

Seems that I will need to ask for a refund.

As a general rule given in that state Start11 is not providing the taskbar it is less likely to be Start11.

That said there is one possibility that disabling things once it detected the other app is causing it to get stuck so I will get that checked out.

Created new thread: https://forums.stardock.com/532790/start11-startallback-spacedesk-empty-taskbar-tabs

I don't see that you have made a purchase of Start11 v2 under the email you posted under, only Start8 a long time ago.  PM me the email address if you made the Start11 v2 purchase under please. 

You have been answered by a CM, myself, and the lead developer of the product.  Where have we let you down in the 'formal support' department? Can I ask what StartAllBack replied with when you reached out to them for support?

Sean Drohan
Stardock Product Lifecycle Manager

I can confirm that StartAllBack and Spacedesk work together without any issues, it's only when Start11 is active with both of them that the empty tabs appear, and if I disable StartAllBack or Spacedesk then they don't appear.

I can recreate the empty tabs by connecting another screen with Spacedesk, and then the 3 empty tabs appear, and they stack up by an additional 3 by reconnecting the screen again.

What I meant by formal support was a direct support instead of getting support through a forum, I'm not complaining about your support, and I didn't contact StartAllBack because I didn't have that issue before when using their software, and now it seems to me that it's an issue that relates to the 3 programmes working at the same time, and if I'll need to coordinate triple support from 3 companies then it would probably won't happen if every company would be able to say that it's the fault of any of the other 2 programmes.

I do appreciate the support and trying to resolve my issue, but as my circumstances are very unique I don't expect it to be resolved.

I can also say that if Start11 would have dynamic taskbar transparency as StartAllBack then I would have used Start11 exclusively.

And regarding Start11 stability I was referring to the Start11 settings window that seems to 'flash', as in that the texts seem to disappear and reappear for a fraction of a second, although it doesn't affect the performance, so it is not that the software is unstable, it's that the settings window interface is doing something that I had never seen happen before with any software I had ever used.