Exported .ts files are corrupted (Missing Context)

When exporting a translated .ts file for Qt Linguist, it seems that the generated file has several issues

• wrong setting of "language" ->always "en_US"

• missing context -> that corrupts the .ts file

• translation type always remains in type "unfinished"

Attached is a source example and a downloaded translation file in German.
Both tested with Web UI and CLI