I have encountered another quirk where it appeared to no longer be allowing instant recording for certain channels, but I also figured out a workaround and what was actually going on. What happened was I have a timer event set for FOX's Animation Domination High-Def but I don't always just let it record the entire full hour. The timer is there as a place saver to prevent timer conflicts with other shows which might claim its tuner. If you're not familiar with ADHD, it's similar to Adult Swim in that it's a block of programming of several 12-minute length shows. I like to individually record the shows so they are separate which calls for on the spot instant recording. To my frustration earlier this evening I was unable to instant record FOX. It seemed to be isolated to only FOX since I went to other channels and was able to instant record just fine, but what I soon understood was the timer event was to blame.
Apparently, if you create a timer event for a show and then cancel it (either once it begins recording or before-hand from either the Guide by x'ing it out or manually stopping the recording via remote) you will find that you now cannot instant record your show later. The record dot will appear on screen for a second but you will not be presented with Recording in Progress, so you instinctively press record again with the same results. If you hit View Live TV and check in My Recordings it will confirm it's not recording. What you can do instead of missing out on recording the show is to go to Timers, locate the Timer Event, and delete it. It will allow you to instant record the show with the remote now.
Also there's a weird glitch where if you start recordings and then stop them, the red dots will still show in the Guide and in the Daily Schedule as if they are active recordings. The recording status will eventually disappear from the Daily Schedule but will remain lit up in the Guide until you do a reboot.Fortunately, it's not taking up a tuner though. There is yet another glitch where you can actually be recording something but if you check the Guide it will show the recording is x'ed out (which indicates that it's not recording) but the TV Activity will have the tuner active and it will be in My Recordings with the red dot. It will not appear as recording in the Daily Schedule and you may or may not have a red light on the front of the receiver.
I've also had it get stuck several times in the TV Activity with the message "....is about to begin recording" but the status never changes to actually record the event. Instead it ties up the tuner for the duration of time for what should be recording. I don't have a workaround for this other than recording the same shows on the other Hopper at the same time for backup. I had this happen three times this morning on both Hoppers and the only thing that saved my sanity was knowing I had it also recording on the other one as well as knowing the episode would repeat at a future time. There shouldn't be a need to keep the same show on both Hoppers for this reason but I'm already accustomed to it after dealing with random STB Reboots breaking shows in half. I haven't had any of those since the S338 update so far.
I have these aforementioned issues on both Hoppers so I assume it is affecting others but maybe it just hasn't been noticed or discovered yet.