LATEX RENDER ERROR

Can't get Latex or mathjax work in moodle !

1.  Because  latex not working in moodle , after some google search , I add

scripts.push('https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML');

in  createScriptTags  in ./mod/hvp/library/js/h5p.js  , It seems  everything is ok now .

2. But when I  create several  slides in  Course Presentation , I found the first two slides render latex ok , but from the third slide on ,

everything goes wrong .

3. Platform :  ubuntu18.04.1 LTS   moodle3.8.2+(Build:20200402)

4 Desktop

5 Browser: Chrome

6 H5P plugin version :  1.20.2  (2020020500)

7 H5P content type:  Course Presentation  version : latest

 It seems  h5p just render the first two slides  in  moodle , I'm a math teacher , anyone can help me please !