Adding a multi-line Sticky Note in the Service Location shows only the first line in the Calendar. This is an online calendar limit. 

This example has three lines in the Sticky Note:

But only the first line appears in the Calendar:

The workaround is to remove the line break in the notes. Place a hyphen, slash, # or anything else in-between the notes to keep them separate. 

Note If you have a line break in your notes as shown in the first image above, all will appear in the mobile app.