Strange Custom Transition Behavior After Upgrade

[scottosmith]

I recently upgraded an app to the latest version of ember-cli (2.14.2) (which also required updating ember-data and ember-source) and in the process upgraded liquid-fire (went from 0.25 to 0.27.3). Since doing this, everything seems to work just fine except custom transitions. I am using one custom transition on a block {{liquid-bind}} and if I put a break point on the first line of the transition, it gets hit twice every time it's triggered. I tested on my master branch and the transition is only triggered once. Any idea why this repeat is happening? I have tried everything I can think of to get to the root of the problem and haven't made any progress. Any suggestions would be welcome.

UPDATE: while typing out this issue description, I noticed liquid-fire 0.28 was released. I upgraded and am still experiencing the issue.

[ef4]

What versions of ember itself (ember-source) did you upgrade between?

Changes there could have revealed timing-related weirdness in your application that would only be apparent when trying to animate.