The average position is wrong in Search Console

I am ranking for a keyword that Google Search Console says the AVP Average Position is 43 when SemRush and doing a manual check-in Incognito and using a VPN shows that I am ranking #4 on page One.

Have anyone experienced the same? This is bad when doing the reporting for the client.

He will always believe Google is correct and SemRush is wrong. How can this happen, please help. I have a report to submit to the client soon.