Crash of front camera after update IOS(13.4/13.4.1) for iphone 7+

After update IOS(13.4/13.4.1) my iphone front camera doesn't work in video communications and such apps as instagram... But I can take a photo on front camera. If I want to call on FaceTime or WhatsApp then app close. If I open front camera in apps then I get a black screen or froze.

What should I do? I can't roll back on IOS 13.3, cause apple doesn't sign it.