Too much oil pressure.
I double what he said about filter dapter. Get aan aluminum billet one.
Check for stuck pressure relief valve inside oil pump.
Find out more about that new check valve.
Here is what you are doing.
If you were to compare the top of the filter with another one just like it, you will see the top has been ballooned up. What that does is it moves the top O-Ring farter away from the sealed surface and if you check you may find that the filter is now not tight it is loose.
Another downside to this is, inside the paper filter will be a hole where paper material has been blown into the oil return channels. Be sure return passage is not plugged with anything before you put it all back again.
The pump should have an internal pressure relief which will bypass oil. It is usually a piston that slides back and forth. That is likely stuck.
Ed