No, dithering is not an issue.
We don't reset the GPG during dithering (one pulse or normal). It continues to operate.
There is a GPG input where you can tell it about things like dithering. invent.kde.org/education/kstars/-/blob/m...?ref_type=heads#L294
GPG only resets on a real slew or a guiding reset, e.g. "lost guide star".