[AchillesPunks]

I probably won't support single widget row but I have looked into this on multiple widgets. If we fix it here, maybe single widget row will get fixed too.
I had a look by setting up 35+ widgets. The focus position/widget height always changes on the 29th widget with poster layout.  Doesn't seem to affect landscape layout however. I think this ties in with @cscott1 issue.

Besides the widget height issue, having this many widgets turned my UI into a laggy mess.  How does anyone have this many widgets and put up with that??

@AchillesPunks 

One workaround could be to put another spotlight content widget at some point before the 29th widget, which should in theory, reset the focus to the proper position, just like the current spotlight content widget does. And I'm totally all for having a second spotlight content widget in between normal widgets anyway, especially if we can get it to customise content so it's different to the first one. Netflix actually does this now. 

No idea how to implement this though. I had a quick look how the first one was created but I couldn't work it out.  Any ideas?

I have a really good idea how to fix this already, and I'm 99% sure it will work. I just haven't gotten around to adding that many widgets. I will though when I can get back to editing things. I'm only available for short periods at time right now.
I have a M.2 Samsung 970 1000Gig ssd, and a 1000 ssd and with multiple widgets even my system slows a little, and it really does take a lot to slow it.

Thanks for your consideration , I am using on PC Kodi , which is Extra super fast compare to Shield or android , Some time Kodi background addons make CPU Usage 100%, that cause to load widget slow and we blame skin mostly .

Yes mine does that too for some reason. CPU goes to 30% makes my Fan's kick on. I just restart Kodi usually fixes it.