Now I am facing a new issue. The table of contents shows the the weird symbols again. The book content shows the correct text. I am on firmware version 5.13.5 (which is latest). Can you provide some insight on this? An example book is available at
https://drive.google.com/drive/folde...ygLi67_F9Y_X1N. The book name is sn1-excerpt.
https://ibb.co/pWwd11D is how the table of contents is shown to me.