Apple Pencil 2 and Microsoft word documents not working well

I have used three apple pencils 2 on word documents and all have same the same problem, the ink stops working, I works again after I use the eraser. I also noticed that pressing twice on "draw with touch" starts working again, but it doesn't last too long. I also returned the iPad Pro and I got a new one and it has the same problem. Has anyone experienced the same problem? the pencil works perfectly with all other apps (pages, pdf, notes...).