RPM Issue with Starboard motor?

Interesting issue this weekend. So I filled up with gas and for some reason now my boats Starboard motor seems sluggish. Yeah I know it's odd, but either it's coincidence or something else just went wrong. When trying to take off and get on plane the port motor now is about 600 rpms higher then the starboard even when using DTS 1 Lever. Eventually the starboard will catch up and it will plane, but it's odd that the DTS says they are synced even though they are not. Also when using individual levers the same happens, so it doesn't seem to be a DTS issue and there are no warnings on the vessel view. I'm going to try and change the cool fuel filters and the water separators and see if maybe something is clogged. Anyone have any other ideas? Thanks in advance.

+1 on the water separators. Maybe the fuel you got was at the bottom of the tank and had some water. Seems too coincidental.

Is there shallow water at the fuel dock?

Maybe you have some thing caught in the prop or somehow damaged one of them?

Thanks for the feedback. Yes I plan to check the props this weekend. Also may attempt to change the plugs.

So, I've changed the plugs, fuel filters and checked the props, but I'm still having an issue. Also now the Port motor will not get past 3000 rpm and I cannot get on plane. It does seem the fuel mixture is running a little rich, so I'm wondering if I have the beginnings of a bad fuel pump or some electrical issue which is mixing the fuel incorrectly.