Hey all, same issue as described above since going to the new firmware. For me, it definitely seems to be with the Roku only. If I watch a recording on my tablet, it plays back without a single interruption. Watching the exact same recording on my Roku results in constant "loading" screens.
I reached out to support, and the rep told me to lower my recording quality and turn off fast live TV startup, then closed the ticket on me without verifying that it was resolved. Quite frankly I'm a little irritated at the complete lack of effort to troubleshoot.
@TabloSupport I've replied to the support case asking for more info, and I'm more than happy to pass along any data that might help track down the issue. Let me know if there's anything I can provide to help get this resolved.