Version

5.4.2

Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?c=line-simple&code=CYQwLiAEC8kNoChLwIwDYAcaUFYDsATAAwkmQA0RAuuZEqptvsaShdbfXOlroaUQIUAdgFcANuJp1k3RnxYkAzO2lceTfqRXkUJNbI0KBAFgp6O6-c1OryV3jdI47MyFQDcCBAHsADmAAlj7CMJAA3vTiAKYA5tHCwABcEQC-9sigEABaPj4AtimIyMiRJSVgAJ5-0SkA5ADO4oHA0QBOdRnlkA0AFj4A7ilgbaLRXeUNEG1gKUQTJQnJkBYLqfQ09AAeAIJbgQ0pZRXVtZB1QfnRdfTp9JV7B0f0yFU19QBuIOJjnbddDXagWih3gLwi4OQwhAV3qAGUfKI2gBjaIrP7dSBvM51ZrCa4LTLgEApLIgQmQEBtaIgOFVGJHdblO7ITapDxAA

Steps to Reproduce

• use step data with multiple same x values of type [time, value]
• configure x axis as time
• add dataZoom as slider

Current Behavior

• dataZoom preview is not in sync with real graph

Expected Behavior

• steps are shown correctly as rectangular line
• preview is in sync with chart without offset

Environment

- OS: all
- Browser: all
- Framework: official editor / echarts@5.4.2

Any additional comments?

I ran into this issue while creating from normal data step data by adding x/y value pairs.