Rendering text isue - Rendered text turns into symbols

[nyffellare]

Bug Report or Feature Request (mark with an x)

- [x] Regression (a behavior that used to work and stopped working in a new release)
- [x] Bug report -> please search issues before submitting
- [ ] Feature request
- [ ] Documentation issue or request

In the latest update we received a big issue on the pdf viewer. It geneates the text info some strange symbols (see image).
It only happens on some browsers and not everytime. We don't seem to find the issue.

[reyduar]

I've have been using the version 7.0.2 and this issue appear when I resize the view, cause of this unhappily my client asked me to change this library