Backup and restore

Hello,

restore of our courses with embedded youtube movies works perfectly, but:

When making restore of the glossary backup, I get only empty glossary, i.e. list of words without description, or as it's called there is a list of "concepts", but "definitions" are empty, there is only <p></p>. When looking into a xml backup file, the definitions are ok, but they are not imported during a restore. This is in the backup, backup seems to be ok, there is a standard link to a youtube movie:

This is in the backup xml file (seems to be ok):

<definition>&lt;p&gt;&lt;iframe src="https://www.youtube-nocookie.com/embed/xxxxxxxxxxxxxxxxxx?rel=0&amp;amp;showinfo=0" allowfullscreen="" frameborder="0" height="315" width="560"&gt;&lt;/iframe&gt;&lt;/p&gt;</definition>

This is in the original glossary:

<p><iframe src="https://www.youtube-nocookie.com/embed/xxxxxxxxxxxxxxxxxx?rel=0&amp;amp;showinfo=0" allowfullscreen="" frameborder="0" height="315" width="560"></iframe></p>

This is in the restored description:

<p></p>

thanks a lot for any help...