after using "detach segment on drag" once, and unchecking (disabling it) it continues to take effect as if it is still active/checked in sketches.
problem happens while sketching.
when i wish to move a line or a circle to resize for example, it detaches.
the problem is still there even after computer restart.
i found another person having the same problem but no one answer to his thread.
i have searched online in diverse locations, i.e. forums, tutorials, and such before asking this questions, i RTFM. this is how i conclude this is a bug.
Thank you peoples.