One issue resulting in the apparent ‘random’ disconnects from online matches has been identified and will be in the next patch.
From Dino Dini’s Twitter:
#kickoffrevival The disconnect happens if one player quits the previous match while the crowd was on, and the other while it was off.— Dino Dini (@dndn1011) August 26, 2016
#kickoffrevival Disconnect issue: Workaround: start a local match before netplay and quit match while the starting music is playing.— Dino Dini (@dndn1011) August 26, 2016
Source: Twitter http://twitter.com/dndn1011