You are not eligible for open work permit. You have to apply for closed work permit as you are not eligible. I think your pr application should be done before there is any decision on your work permit.I have employer restriction. But I have applied for another WP in purpose to stay in Canada while no DM on my PR, which is open. It has extended my current to 4 months per mail from IRCC.
P.S. I'm saying that it is spousal WP because my motivation to get this WP based on my spouse's WP which is open.