@marienka An hour after I submitted my comment, the WAVE function for the entire region (including part of the Great Lakes) was disabled. Now, no WAVE data is displayed in that area. Up until that time, WAVE functionality worked fine except for the issued I first reported. You can see that waves were displayed in my original pic. This is what I see now.

See the two lakes in the northern portion of lower Michigan, USA. There is a box behind one of the layers that sometimes blocks the display of WAVES. You may need to scroll in or out to see it. This happens in the Android app as well as in Chrome on my desktop computer. Here's a pic: