I’ve had this with a Pro 3 road hub, and and RS4. The RS4 settled down after a few hundred miles, and still occasionally reoccurs after changing cassettes. Pro 3 always felt off – convinced it was the cause of some hip pain after a particularly long ride – replaced with a 240s.
Had both apart and serviced / replaced pawl springs – didn’t help.
Edit: Also tried the zip tie hack, double springs, lighter grease – never did work out what the problem was.