I missed my wife's form, so I sent scanned file of missing form through webform two times. They accepted it. Make that form again, sign, scan and send electronic file through webform.
The following is the response of webform.
Thank you for contacting Immigration, Refugees and Citizenship Canada (IRCC).
We have received your application on May 19, 2020, and it will be processed according to the date it was received.
Furthermore, we are pleased to confirm the reception of the following document:
02_imm5669e_Spouse_signed & scanned.pdf
We have forwarded it to the responsible office for their consideration.
If further information is needed during the processing of your application, the responsible office may contact you.
We hope the information provided is helpful in assisting you with your enquiry.