It look like it's the signal from the controller, that cut off somehow.
When you say suddenly, then is it while you are playing or after a break?
Which powerplan is your Computer set to? Is it set to high performance mode? And is the powerplan set to not go in power saving mode and not shut down USB connections, when you take a break?
Have you tried another USB cable for your controller?
You does'nt mention you use a host for Analog Lab. If you do use a DAW or another host, then please test if the problem also excist, when you use the standalone version of the software.
Which excact CPU do you have? Do you use a SSD or a HDD?