Spoke with Redbox earlier and they indicated they were working with Roku to resolve issue. Only thing they knew for sure is that it does not seem to be affecting Roku devices with OS 12, and only affecting certain build numbers of OS 11.5. (I am still leaning toward a server configuration issue, but who knows). Representative seemed a little surprised that some of my 11.5 builds were still working so noted it for their engineers. (some of these build numbers were on the list for those supposedly affected.)
So far, the only workaround I have found to work is to stream content directly from Redbox website. Either use the Redbox mobile app and cast to your TV (if capable), or load Redbox on a laptop and either cast it to your Roku device or use a HDMI cable from laptop directly to your TV. https://www.redbox.com/
Additionally, seems to only be affecting Roku devices at this time.
I was having problems accessing the Redbox website yesterday to try the above, but today it is working so again able to stream Redbox free On-demand and LiveTV in this manner on the TV with my affected device.
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No amount of network configurations/changes/spoofs or removing the channel/app from your Roku devices is likely going to currently address this issue. (at least none of my attempts have proved fruitful). The fix is going to have to come from Redbox. Best you can do in the meantime is to periodically run a manual system/software update (Settings/System/Software Update) and hope your Roku device is either updated to OS 12 or the Redbox channel receives an update fix. (whichever comes first).
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
