When I plot raw data on macOS using the qt5 Matplotlib backend, some axes overlap and are therefore unreadable (the time axis labels of the currently visible segment, the "Ch." label, the channel labels, the x axis label, and even the "Help" button):

Everything works when I use the default osx backend though:

Is this something we can fix? Where would you start debugging this in the first place? BTW, everything looks normal on Linux using the qt5 backend, so it seems to be specific to macOS (I don't have Windows to test this).