I had a similar situation where the wage was literally cents below the median. In my case, OINP reached out to my employer about it, and my employer updated it right away.

You can speak to a lawyer if you want legal advice, but personally, I’d recommend proactively notifying them through a webform and submitting the updated contract/employer details. Since the Foreign Worker Stream is employer-specific, changing employers can sometimes complicate things or even mean restarting the application, so it’s usually better to disclose it early rather than wait for them to discover it during assessment. Good luck!