For the last 6 months, I can't remember exactly after which firmware update, but after one of the Android updates, my TV channel changing got a very nasty delay. Sometimes as long as 30 sec.
Sorry for vague info, but I was searching the Google and one of the suggestions was to disable the new "suggestions" Android or Sony added after the major update. Basically on home screen you would get some suggestions and there was no way to disable, unless you went through system and disabled through there. I can't remember how I did it, but I know it didn't help.
I Also tried clearing cash. The only thing I haven't done was a complete system restore. I was about to do it, but some of the Sony support website posts were saying that it doesn't help either.
Basically, after I use the Android Home menu for Netflix, YouTube, etc, then go back to TV (Antenna, I don't have cable), the channel switching gets a horrible 20+ second delay. Sometimes it ends after 5 min and sometimes it doesn't.
After this started happening there were 2 more Android system updates that I hoped will fix the issue, but it never did. Had this TV since 2016 and never had this issue before. Anyone got a clue what to do?
Have had a very similar issue with my xbr65x900e. The channel switching when it's working well I'd say is about 5 seconds. After watching another source and/or picking TV from HOME menu is about 10-15 seconds.
I've chatted with Sony support and besides doing a factory reset (pain in the ass) they recommend:
Good luck. But have had same issue. Doubt the Tuner will get anymore updates.