Conflict between `transition` component and `:style`

[schoonc]

Version

2.5.3

Reproduction link

https://jsfiddle.net/50wL7mdz/75618/

Steps to reproduce

Look at the rendered square.

What is expected?

Blue square.

What is actually happening?

Red square.

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If remove wrapper (transition) or change vue version to 2.3.4 (in 2.5.* and 2.4.* bug remains) problem disappears.

Thanks!