I don’t know about German, but in Swedish it looks really messy if you sunder your compound words. In general I think people know what you mean regardless, but you can end up with peculiar double meanings. There are plenty of signs, notes, and what have you that people have posted online for a laugh.

Off the top of my head

• Gå lättpackad i fjällen
  • Travel lightly (as in luggage) in the mountains
• Gå lätt packad i fjällen
  • Travel slightly intoxicated in the mountains
• Sjukgymnast
  • Physiotherapist
• Sjuk gymnast
  • Diseased/Sick gymnast
• Årets sista svenskodlade tulpaner
  • The last Swedish-grown tulips of the year
• Årets sista svensk odlade tulpaner
  • The last Swede of the year cultivated tulips

It’s also worth noting that the tones can be different, so if you “hear” the words as you read them, then “lättpackad” and “lätt packad” sounds different.