If you got the AOR and it says you can do BOWP, it is. You still have 4 months ahead, so you can still wait another 2 (but I really hope you can get the eCOPR sooner) but I would not jeopardize when you’re so close to get your PR, even if that amount of time you’re waiting is not your fault. If you apply for extension, BOWP, there’s the refund possibility if they didn’t assessed anything.
Also, I’m not a regulated rep, so you should seek one if you feel you still didn’t look all the options.
I hope the below link helps…
https://www.canadim.com/work/open-work-permit/bridging-open-work-permit/