I have a serious problem regarding the Bounce Rate for our site, I have never seen anything like this before. I just recently took over the management and usually work with Google Analytics. When I analyzed the Bounce Rate I was sure that the reason for all this would have to be a Server Issue, but anything likely or related to server problems was excluded, pageload times also confirm this.
As you can see in the attached screenshot, what happens is that the Bounce rate stays low for a long period, then goes up for an even longer period and comes down again. There is no logical explanation for this, can anyone help me out or has experienced something similar?