While I understand this is frustrating, it's not something that is broken in OpenShot. It's most likely a regression in MLT with a newer version of FFmpeg, or it's just an issue with FFmpeg. Either way, there is nothing we can fix in OpenShot, so I am going to mark this as 'Invalid'. This should probably be reported to the MLT developers, with an XML file to reproduce the issue using 'melt'. Thanks.
While I understand this is frustrating, it's not something that is broken in OpenShot. It's most likely a regression in MLT with a newer version of FFmpeg, or it's just an issue with FFmpeg. Either way, there is nothing we can fix in OpenShot, so I am going to mark this as 'Invalid'. This should probably be reported to the MLT developers, with an XML file to reproduce the issue using 'melt'. Thanks.