Hi ,
As long as u r working in canada , the proof of funds is not mandatory . i did send this to Opportunities Ontario and they sent me a response as below .
"Individuals applying under Express Entry under the FSW category may be exempt from demonstrating the minimum level of savings if they have arranged employment and are working in Canada.
Individuals applying under Express Entry under the CEC category may be exempt from demonstrating the minimum level of savings if they are working in Canada and their income and/or savings meet the minimum level of income to support themselves and any dependent family members. "
Hope this answers your question .
To be safe , send a mail to them and get this response in a written format to support your application . I did call them first and they suggested me to send them an email so that we have written proof. I was surprised by the turn around time in their response. They sent me a response within 24 hours and there was no waiting on the phone either .