This problem recently arrived on my Roku. Version 7.7.0, build 4117. Help?
I tried updating to build 4135, no change. Resuming playback doesn't seem to be much help so far (I get "File Not Playable" almost immediately).
This is happening on movies that I've watched many times successfully. Problem is occurring on both Roku 4K and Roku 3. Again, appears to be >4GB files only.
Can I downgrade my firmware? : /