Reflection Capture: Pixaleted reflections on glossy materials

Hi, i have an issue with reflections from Reflection Captures on glossy (Roughness from 0.05 to 0.2) material.
“Reflection Capture resolution” In project settings is setted to 2k and its pretty enough on mirror for example. Also not a big problem on 0,5 and highter amounts. But between this amounts reflections became super pixelated like i have 32px cubemaps… What should i do to improve reflection catpures quality o low roughness amounts?

P.S. I can`t use SSR/RayTracing because of project requirements.