Broken writing (dotted) with Apple Pencil

Hi, I’ve an iPad Air 2020 and IPad mini 6 with iOS 15.2 updated. Suddenly my Apple Pencil 2 started working weirded. It attaches to iPad normally and shows the Pencil charging as usual. However when I start writing, it writes in dotted pattern (broken characters and lines). A day before, everything was fine. Tip is the Pencil is ok. Bluetooth connect is ok. Please help.