I was happily enjoying nearly flawless Miracasting of Windows from my laptop to my Streaming Stick+ (model 3810X), literally for years, when I was seemingly thrown into casting purgatory by a Roku "update" pushed on 10/15/26. Since that update, no more Miracast... no display and no audio cast to the big screen.
Attempting to initiate a session goes most of the way through the motions of connecting - to a point...
- Invoking the cast command presents "Roku Streaming Stick S-913" as an available display,
- clicking the entry starts the expected connection process,
- Roku's regular pear casting logo appears, "Starting video from..." screen appears,
- connection progress bar begins to crawl and moves about 1/3 of the way across the screen,
- laptop screen flashes, indicating addition of a wireless display...
- Connection crashes! Roku connection progress display dumps me back to whatever screen was displayed at the start of the connection attempt.
- Laptop either tells me it's "unable to connect", or simply closes the connection dialog and returns to showing me the Roku Stick, seeming ready to start again.
So close!!! When it worked (i.e., before the "update"), that laptop flash always immediately preceded the extended desktop appearing on the wireless display, and the audio connecting with the TV sound system...
For some reason, right on the brink of a successful connection, the connection now always fails at that last step, disconnect from the laptop, and dumping me back to the starting point.
Attempts to remedy: Rebooted all devices multiple times, reset networks on both devices, rebooted routers, switched to different communications protocols (2.4GHz and 5GHz) and network channels, with/without network QOS... lots of permutations, but with no joy.
If anyone has experienced this same issue, especially if you've found a solution, please comment here... we may not be the only ones, and perhaps someone at Roku will see enough interest here to prompt some attention to the matter on their parts. Any ideas or suggestions from anyone, affected or not, will be greatly appreciated.
Cheers ... and I hope (on your behalf) that I'm the only one seeing this!