DOP : delete process = resize region. why ?

Hi,

i have a 5sec region and i use DOP but don’t make it permanent
later a resize that DOPed region to 3sec.
in the end i decide to remove the DOP process.
doing so my region comes back to it’s original size… why is that ? is there a pref to set to avoid that ?
annoying with multitracks :stuck_out_tongue: