What baker, and what are you using to render? Can you give some context... how small or large is this detail? What does the lowpoly wireframe look like, and what does the highpoly look like? Are you using edge padding? Did you see the Sticky topics in this section?
Every time before I post a thread I check half of an internet, including this forum and as I said in other words: the solutions didn't work for me. I use edge padding. Eevee/Cycles, the problem appears no matter of rendering engine. I forgot to mention the software and actually it's probably important thing here, sorry.…