I notice every time that I open Survey123 Connect, while it opens at full screen size, it doesn't actually open in full screen on the monitors. It opens just slightly off center and then is across two monitors and needs to be re-sized again to actually be in place full screen. This happens when the application was closed from a full screen state. The 64-bit field app on Windows does the same.
My monitors are both 1920x1080 resolution at the office, though I am pretty sure it does this on my home set up as well.
Super minor annoyance, but wanted to bring it up!