CM93
charts normally cover 80S to 80N, but there are some stripped down versions with part of the data removed circulating around, how big is the folder with your CM93 charts (The full set should be at least 1.4 GB, up to over 2 GB, depending on the version you have)?
Also you are in
single chart mode (should not cause your problem and does not for me, but still), enable chart quilting (either from the
canvas menu shown after clicking on the "hamburger" icon in the lower right corner or by pressing Q)