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Yes ! Same here, noticed Saturday evening on my Apple TV 4 (hd model tvos14.2)
When I hold the menu button, the control center pops up but immediately disappears :( So no access to airplay or the sleep button.

Today I noticed on my iPhone X , when going in to control center then music controls, it crashes and goes to my home screen. Same on my iPad.

Seems like all my ios14.2 have the same issue. Airplay from my iMac seems to work as usual.

Everything in my home was on IOS 14.2 since launch, except for my iPad which was updated last Friday (I'm not sure)
I've restarted all devices but no changes. Also complete reset of the applet tv didn't make any difference.
 
Okay, got it solved. I did the following.

I signed out of iCloud on both my iPhone and iPad, then signed back in.

on both devices in the settings I had a warning that I needed to update my account to have all functionalities (there was a red dot with an exclamation mark on my Apple ID)

So I re-entered my password on iPhone and iPad. Opened the music app on my iPhone, started some music, and did a handoff to HomePod.

After this airplay is back to normal on all my devices. iPhone iPad Apple TV and my wife’s iPhone all had this issue.

Only thing I can think off which might have caused it is the ios14.2 update and the fact that I changed my apple id password(but that was months ago)
 
The same thing started happening to my iPhone 11 Pro Max running 14.3 pb and my wives iPhone X 14.2. But only when we’re on a WiFi where an Apple TV is present. I will try resetting my AppleTV from the recent 14.3 pb and see if that helps.
 
iOS 14.2.1 here and i have this airplay issue, as soon as i touch the airplay button to select a speaker in control centre my phone crashes and if i try in the music app, the screen just flashes for a second and goes back to what i was listening to, its only come on in the past few days as i was using the functionality a couple of days ago, its very annoying. Wont handoff to my homepod mini either.
 
Exactly the same issue here on both my iPhone 12 Pro (14.2.1) and iPad Pro 12.9 3rd Gen (14.3 public beta second release). Just finished a call with Apple tech support. We ran through all the troubleshooting [reset all settings, reset network settings, reset my wi-fi network, reset my airplay devices (homepods, stereo) signing both devices out of iCloud, hard reset] but problem persists. They said that the next step is to set up the devices as new (not restore from a back-up) and see if Airplay will work, then restore from backup and see if Airplay works. Apparently Apple will only send the issue to senior software support if Airplay is not working while set up as a new device. If it ends up being an issue with my particular iphone & ipad set-up (i.e. the back-up version), there’s no further support available. Seems short-sighted, since most people are not starting from scratch each time they get a new device or update iOS, but I guess this is Apple’s triage method. I’m still syncing my iCloud after logging out during troubleshooting, but as soon as that’s done, I’ll try a clean set-up and report back...
 
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