Itβs an iOS/Webkit bug. I had a cumbersome workaround for that, but it wasnβt worth fixing it that way as it was complicating things a bit too much and most people probably never notice.
I hadnβt noticed them before, but if you take a screenshot and zoom in a little you can see them. Once youβve seen them you canβt avoid them. Iβm not sure I would say they are jagged more like extra pixels. (iPhone 12)