All content disappears when any text field contains the "\" character

[ysd-wilson]

Hello, I made a test on:
https://h5p-laravel-demo.stage.etd24.pl

1. Create new elements/edit content
2. Content type: Interactive Video
3. Enter a string containing the "\" character in any field such as "Title" field
4. Save
5. Reload the editing page and all content will disappear

[qunabu]

can you confirm it is working fine on other h5p like h5p.com ?

[ysd-wilson]

@qunabu Yes, I tested on h5p.com and it works fine.

I first encountered this problem when I was testing "drag the words" and saw the example in the instructions. The example below contains the "\" character.