at least this is good they dont reject your application. Because I have seen many cases that application just directly rejected due to issues with the PCC. Now CIC has cleary stated that they will bo no rejection due to the covid19 situation. So if you can not make it on time, raise a webform and explain. They will be no problem. As I said, you got the ITA which is the most tricky thing to get. The rest is a matter of time. You will get it, a bit later than scheduled, but inshALlah you will get it. See how many FSW outland are desperate, even with 500CRS score.
Yes, you're right. Quite lucky that they gave another chance to resubmit the correct police clearance. Fingers crossed!