Problem with CCR1072 freezes

Good night,
Thank you in advance for your time and help.

I have a problem with the CCR1072, out of nowhere it starts to freeze, that is, because of how well it is working, it freezes. When this happens, I can log in to the computer, but when I log in, everything goes blank, it does not load the interfaces, nor do I want to give it anything. the restart command but it does not obey, currently that computer has 2500 pppoe sessions however this error has occurred recently and I do not know what could be causing it.
I appreciate if you can help me.