I think that cover art may be for a fan made soundtrack. The soundtrack includes Jabba Sail barge music, the different celebration ending music etc....

The abrupt end of Ewok celebration sounds like a fan edit.

The same is found in the choral version. An edit has been made to have the Return Of The Jedi end title music. The original version of this track was on the Star Wars Anthology CD box set, but for some reason they decided to put the end titles of The Empire Strikes Back afterward.