After updating from Events Manager v5.0.1 to v5.0.2, I noticed that any events with number-based HTML entities get messed up on the single event page.
So for example, if a event description contains ampersand-hash-8212-semicolon (for an em dash), it gets rendered as just ampersand-semicolon.
I narrowed the problem down to the changes that were made to em-location.php in 5.0.2. When I roll this file back to the version that came with 5.0.1, those HTML entities render properly.
I think the Events Manager is trying to treat ampersand-hash-number-semicolon as if it were one of its placeholders.