out-in transition issue with async components in a <keep-alive> block #6256
Description
Version
2.4.2
Reproduction link
https://jsfiddle.net/z11fe07p/2382/
Steps to reproduce
- open https://jsfiddle.net/z11fe07p/2382/
- click the "B" button
What is expected?
The previous component (A) should disappear before component B appears
What is actually happening?
Components A and B are visible simultaneously
see also issue #5760