Hello
I’ve recently received my ITA for Canadian PR & I’m now in the process of submitting my documents. However; I am facing a delay in obtaining a few required documents, including my police clearance certificate and some medical records. 
While I understand that I should submit the documents as soon as possible; I am unsure whether this delay could impact my overall application timeline or result in rejection. 
Can anyone share their experience or advice on how to handle such delays in document submission? Should I notify IRCC about the delay, or is it better to wait until all documents are available? Also, is there any flexibility in the document submission deadlines, or is it strictly enforced? 
Checked Post ITA - Community Java guide for reference but still need advice .
I would really appreciate any guidance from others who may have faced similar situations during the post-ITA process.
Thank you ! 