come on top of
come on top of (something)
To occur very soon after something else. To have another tragedy come on top of a death in the family is just devastating.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
come (right) on top of something
Fig. [for something] to happen immediately after something else. The accident expenses came right on top of the costs of her illness. The bad news came on top of some other problems we were having.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.