Compatibility problem with multimedia filter

[zabellemotte]

In Moodle 3.9, this question type breakes the multimedia filter that is commonly used to integrate medias in questions. To reproduce the bug :

• activate multimedia filter in contents Administration > Site administration > Plugins > Filters > Manage filters
• create a wordselect question
• place some marked words as question type supposes to
• use the link button to add a link towards a loaded mp3 file in question text
• save and preview

In other question types, the edition form shows a link toward the file. In word select edition form, the multimedia filter seems to be loaded. In other question types, the preview shows a player for the audio file that plays the audio. In word select, the preview shows the same player but the audio does not play and an unending loading circle appears.

[zabellemotte]

In Moodle 4.1, the wordselect question type seems to annihilate the multimedia filter effect and shows a link toward the audio file, as well in edition form as in preview.

[marcusgreen]

Thank you for your detailed report. I have an idea this is a bug that may happen with any filter. I have an automated test for the multilanguage filter, which you can see here https://github.com/marcusgreen/moodle-qtype_wordselect/blob/master/tests/behat/filter_test.feature But I suspect it depends on where the item is in the text. I will investigate, though I think a will not be trivial.