Utm tracking incomplete

Hello,
currently I’m switching from GA to matomo. In order to run a test I have created a FB traffic campaign with these simple utm-parameter
utm_source=Quelle1&utm_medium=Mittel1&utm_campaign=Name1&utm_content=Inhalt1

Currently matomo tracks only for 30% of the visits the utm parameters, while GA tracks them all.

Any idea how to fix that? I tried to post the pracking code here, but it was removed by the board software.