Version

5.3

Link to Minimal Reproduction

https://codesandbox.io/s/apache-echarts-5-3-ssr-demo-forked-022g8m?file=/src/index.js

Steps to Reproduce

I used the example chart in 5.3 update and changed it to "line" from "bar", and added label { show: true }

Current Behavior

labels do not show on line chart. They show on bar chart.

Expected Behavior

labels should display on line chart

Environment

- OS: MacOS
- Browser: Chrome
- Framework:

Any additional comments?

No response