If there are two tracks or routes leaving from a component lead and if those leads are at the opposite side of the board, the connection is cut when the part is deleted.
This is how the bug can be seen
Starting from this
Then I delete the resistor and the connection is broken, and in my opinion it shouldn’t, because that may create a lot of connections to fix
And a broken connection is created
Edit: And worst of all, Schematic and Printed circuit board do not match.