Sometimes while working in Autocad Electrical 2018, if I'm going back and forth between ACADE and a different window, when I scroll one 'notch' to zoom, it will zoom to near infinity in whatever direction I scrolled. If I toggle back to another page, scroll there, and come back, it fixes the problem. I haven't determined whether or not scrolling on the other page is necessary, or if the window change fixes the problem.