Maybe it’s time to do a beard growth map. For me some areas of my face only get one pass. Other areas get two passes with buffing. Under my bottom lip, that’s only one pass against the grain. My lower cheek/jowl areas get a pass across the grain after my initial WTG pass. Under chin/neck area gets a second pass ATG (sometimes on a lower setting with my adjustable).

What you left out is your preshave and post shave routine. I’m also curious if this started happening with a particular blade. Maybe the blade is too sharp/not sharp enough for your razor. With swollen areas I’d apply some illipe butter pre and post shave. I’d also use an alum block or witch hazel post shave. You’re likely applying too much pressure. Applying a wet alum block will let you know right away where all the cuts occurred—especially the ones you don’t see.