I tested this little bit and the same problem appears with all other Selection Modes, so in step 2 instead of Union mode select any of the Exclude, Xor, Intersect mode and the problem in step 5 then result in "jump" of first selection.
I tested this little bit and the same problem appears with all other Selection Modes, so in step 2 instead of Union mode select any of the Exclude, Xor, Intersect mode and the problem in step 5 then result in "jump" of first selection.