Yes, sync should adjust up or down appropriately.
The danger is if you bother to get the margin reset now, that it will creep back up and need resetting again once the work is done. ie. wait until all the work to improve a line has been done.
Margin does not increase for no reason, and if the instability is still there (may not be visible if higher margin is masking it), then the margin will go back to a high value.