Xfinity crashing and other issues

Hello. My Xfinity streaming app on my TV has been crashing lately. It started about a month ago.

What happens is I'll be watching something on the stream then all of a sudden, it quits and brings me back to my TV's (TCL), main screen. Once there I scroll down, select the Xfinity streaming icon again and it brings me back to the streaming screen. This happens 3-5 times a day.

That's the most recent issue.

Another issue I've been having, which I spent time with your customer service folks, happens when I'm scrolling though "mini guide".

It seems to have something to do with screen refresh rates. What happens is I'll be scrolling through the channels within the mini guide and after about 10 channels, it stops scrolling. It gets frozen. In order to get it scrolling again I have to click either the up or down button ONCE on the remote, wait a second or 2, then it will let me scroll through another 10 or so channels. This will repeat itself everything single time I'm scrolling through the mini guide.

I'm sure you can understand how incredibly frustrating it is when I'm channel surfing, which is the way I usually watch TV, and every time I want to look up what's on, I can no longer hold the up or down buttons on my TV remote and have the screens roll continuously, or I should say scroll freely, without it getting stuck every ten channels or so.

Any help on these issues would be greatly appreciated.

Thanks so much.