view not update when use transition in this case

[iqingting]

Version

2.2.6

Reproduction link

https://jsfiddle.net/4mpf6x1r/1/

Steps to reproduce

click the update text

What is expected?

position changed

What is actually happening?

position not changed

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it worked when i do like this: https://jsfiddle.net/4mpf6x1r/2/