I would check the pitch of the machine first of all

Did this just start happening? Is this a new game you picked up/borrowed from a friend?

Maybe post a picture of the right ramp and wireform leading to the right inlane. Gotta be something simple.

Good luck !

Check if there's anything underneath like a screw head that might be poking up through enough to contact the ball

Make sure the metal ramp flap at the bottom of the ramp is flush with the playfield. If either lower ramp screw is loose or missing and the flap isn't flush, that will get you some air balls.

You can bend the ramp a bit to help.
The top wire closest to the right drain. Bend that up I believe.
I got to bend mine a bit more, still get some drains off the ramp.