Well, you are smarter than me, I applied for BOWP on April 14 when I realized that my PR application is taking too long, and will only get it in August according to your timeline. And yes, if the PR application is rejected, BOWP is cancelled too. So let's hope it's not gonna happen. I honestly don't think it happens too often when everything is completed, and the application is stuck at the security check, unless you know the reason why you might be inadmissible.Btw they issued me a BOWP 20 days ago (I applied for it along with my PR application). That took 145 days and it is valid for 2 years. I don't know if it will cease if my PR application gets refused (I did some research and found the answer in both ways, including a posted formal response by a law firm saying it will be valid until its expiration regardless of the outcome of the PR application).