Ágota

[Bug] Symbol doesn't appear on polyline

2

### Version 5.5.0 ### Link to Minimal Reproduction https://echarts.apache.org/examples/en/editor.html?code=PYBwLglsB2AEC8sDeAoWsAeBBDEDOAXMmurALYTREAMANCemQIYZECMdDsIweEkMIgHIwoIfVKwW-ADKUApkVST0eABbAA7kQBmTADZ55XAL4TYZkgE8c-JVwpVYnSc1awOJS6vkAnCPKEsADaXMoqYFYgirBC-gp44lzoosD6kCD2KqTqWroGRskW5pIAJkxgTESh2ejhtbAAxsDAvqVBNQ2kwWy0HgC6JV3BAEx9I4NF2cEALH0ArJNd3QAcfSv9U6SbDSZFSyp4VmQARmnVQtAw8uKxTL6-WkIHkjz6VvHQMWC-AK7yQ1UxzO-gAyhAAF4xDiApotNqUCryUFWPBgeRkYSNe7ovhMaAjUpJbKfZGRfQxeoqTQQUpgNREMZbZr6VrCE76JiNADWxNqoC5_Cs7CKe0kYtgmxMAG4gA ### Steps to Reproduce 1. Create series of type 'lines', set 'polyline' to true 2. Add symbol ### Current Behavior No...