Given the attached BAT file, I selected multiple cursors for line 16 to 21.
At the of the line I typed "set EX".
Slick prompted to complete it as EXCLUSIVEARGS.
But ... the 2nd line (line 17) got 3 copies of "EXCLUSIVEARG" and 1 copy of 'EXCLUSIVEARGS"
Seems to be easy to reproduce.
SlickEdit Pro 2022 (v27.0.1.0 64-bit Qt5)