During review required state, when the 4 eye validation on your application happens and the next officer reviews your application and that officer doesn't find the additional 8 months of valid experience as per the NOC code that you applied for, then consider dude, that a big problem. When the next set of 2 eyes(Review Officer) completes then they reduce your points if they don't find the additional 8 months experience and if the points are below the Minimum CRS score for which you applied for, they the Officer will straight refuse the application.
Remember, I am not mentioning this being rude or want to scare the hell out of you. I WAS ON THAT BOAT.
If you already submitted the additional 2 years experience and if it added to you profile then you are safe. I would recommend to call the IRCC and mention that you submitted additional 2 years experience proofs for the NOC code that you claimed your points. And ask them how to find out if the experience letters from that web form has been uploaded to your file.
Otherwise, you can raise GCMS notes to check all the activity on the application and you can find out the result of the web form that you submitted. Act quickly.
Hope this info helps. & I wish and pray that your application is all in good hands.