Round corner is a pretty invaluable tool, but I seem to run into the same problem again and again… possibly even increasingly so?!?
Quite often if I draw a kitchen worktop, then punch a sink hole through it, then try to bevel the edge I’ll end up with a line/some lines running from the edge of the sink hole, to the edge of the worktop, with a face missing between. I tried changing the bevel to 1 segment, but it won’t allow it.
Similarly, even rounding the corner of this window board (admittedly easy to do just using arc, but in the interest of perhaps understanding) does a similar thing?