Thank you for a quick reply.
What I forgot to include in my question was that I use Shotcut to generate the xml-file for my project, which i run through qmelt on a server in order to move the load away from my laptop.
When i use your advice in Shotcut running on my laptop it works. But when i send the xml file to qmelt and let it render the project, i get the problem mentioned.
Am I missing some setting or…?