Hi!
First thanks for making matomo, it is really a great tool!

I've been trying to figure out why the content tracking does not work on our site, and it seems to me that the content tracking impression/interaction are not logged if I'm on a page with an url like www.example.com/de/suche?q=foo

I'm using Matomo 3.6.1

I tried registering content impressions via the JS API, if i'm on the first url with ?q=foo, it does nothing (doesn't even show up in DB), on the second url without params it works as expected
_paq.push(['trackContentImpression', 'Content Name10', 'Content Piece', 'http://www.example.com']);

The two requests sent by the js:

`www.example.com/de/suche?q=foo -> content is not tracked
https://www.example.com/tracking/piwik.php?c_n=Content%20Name&c_p=Content%20Piece&c_t=http%3A%2F%2Fwww.example.com&idsite=1&rec=1&r=669930&h=21&m=0&s=7&url=https%3A%2F%2Fwww.example.com%2Fde%2Fsuche%3Fq%3Dfoo&urlref=https%3A%2F%2Fwww.example.com%2Fde%2Fsuche&_id=a12d8585abf78f86&_idts=1540578212&_idvc=1&_idn=0&_refts=0&_viewts=1540578212&send_image=1&pdf=1&qt=0&realp=0&wma=0&dir=0&fla=0&java=0&gears=0&ag=0&cookie=1&res=1280x1024&gt_ms=116&pv_id=upDUGm

www.example.com/de/suche -> content is tracked
https://www.example.com/tracking/piwik.php?c_n=Content%20Name&c_p=Content%20Piece&c_t=http%3A%2F%2Fwww.example.com&idsite=1&rec=1&r=044145&h=21&m=0&s=33&url=https%3A%2F%2Fwww.example.com%2Fde%2Fsuche&_id=a12d8585abf78f86&_idts=1540578212&_idvc=1&_idn=0&_refts=0&_viewts=1540578212&send_image=1&pdf=1&qt=0&realp=0&wma=0&dir=0&fla=0&java=0&gears=0&ag=0&cookie=1&res=1280x1024&gt_ms=77&pv_id=a5ZBko`

I tried a few variations now:
?q=1 - doesn't work
?q= - works
?q - works

Am I missing something?