Yep... Roku mirroring has been like that for many years.  If you want to mirror get a Chromecast.  You can thread after thread of broken mirroring.

I'll just comment Roku has allowed authentication to be a HUGE hassle every time accessing content.  Roku really needs a standard (monthly) authorization that works across all Roku apps and subscription TV services.   I'm not saying it easy to do but an authentication standard for the platform would...

Maybe I was unclear about the nature of the problem. ISP's don't have access to turn off the entire tv display while having the video play (while the tv is black) causing me to miss content. Huh ? ISP provides network data using TCP/IP protocol.  Your Roku has an embedded operating system based on ...

Please note the issue was resolved yesterday afternoon as many including myself were able to stream BTN football games using our Verizon credentials.

Maybe I was unclear about the nature of the problem. ISP's don't have access to turn off the entire tv display while having the video play (while the tv is black) causing me to miss content. Huh ? ISP provides network data using TCP/IP protocol.  Your Roku has an embedded operating system based on ...

That seems like normal behavior for many ISPs as they all tend to over subscribe bandwidth (ie make more money with only minor affect of users performance)  Just enough that you don't disconnect your service).   This is called buffer delay and not data interruption.  Nothing Roku can do other than s...

Casting to Roku with Windows is complete waste of everyone's time.  If you want to cast or mirror use a Chromecast.   

I think Fire TV would be a better choice now , but Chromecast  I think is the best choice as you can mirror any tab from a PC.  So you can watch any video supported on the PC platform and you are not restricted to only the apps that support the content you want.

Well the creator of Roku app gets to determine what it supports. This is a huge reason why I will never get a TV with built in Roku.  Also I tend to keep TVs many decades until they don't work and even replace power supplies or use an old VCR when tuner goes bad.  I prefer to use older TVs for retro...

Please note third party post below is to address the original question asked as the issue is a known issue with Verizon FIOS TV and Fox Sports App (on any platform - Roku, PC, Android and iOS )

https://www.dslreports.com/forum/r32474063-Fox-Sports-streaming-app-excludes-BTN-on-FIOS

Try a different ...new from the package HDMI cable between your Roku and the TV.  
Most likely the HDMI handshake is intermittently failing due to a poorly made HDMI cable.

Also make sure you have the most recent firmware on your TV and the most recent Roku firmware.

The Chromecast app no longer works on my laptop, but does on a smart phone. It looks like the only way you can cast the Chrome app to the TV is via a smart phone or a ChromeBook. It works fine on my old Chromebook I kept as a backup, so I finally have a use for it. Much easier to use than the phone...

Well Windows has an App so I was curious if there was an app for Linux No though the Roku supports Miracast so you can try the Ubuntu Miracast packages .. but I doubt they will work.   Note: You can use the following remote control web app from Linux.  I actually use it from a very old Blackberry w...

I really appreciate your quick and honest reply.  It frustrates me because I have loved having my Roku for numerous years now and I find it poor customer service that Roku wouldn't support a faulty model.   I hesitate to ever buy or support a company that wouldn't offer a solution when this softwar...

Welcome to world of Roku channel ads. The exact same three ads over and over and over.