Perhaps if you provide some clues we could. What your equipement, which OS version which updates, which device are in play. Have you try any brush smoothing and differebt brush settings. Window 10 Ps 2020 version 21.2.4 Wacom intuos WinTab hard brush spacing 1% small camvas.
Does your Huion Kamvas GT-220 work well with other application like MS 3D paint and whiteboard. In these Application my Wacon intuos works using INK API not WinTab. I can not tell if 3D supports pen pressure I do not think it does, Whiteboard does but its marker type paint not brush type painting. So tip dynamics is not large.