Mixed line/symbol time series chart breaks on zoom/refresh

[ryanhamilton]

user-sl user-mpm

When a time series chart contains a mixture of line series and symbol series, zooming or refreshing the chart causes the lines to become visually corrupted or “mixed up”.

This only occurs when both symbols and lines are present together. The issue can sometimes be temporarily resolved by resizing the browser window.

Example data mentioned:
Quy_price, sell_price, HEL_POS, mia_0 with values around 0.246–0.228 at ~17:55.

Steps to reproduce:

1. Create a time series chart with both line and symbol series
2. Use a moderately large dataset
3. Zoom in or refresh the chart

Expected behavior:
Lines and symbols remain correctly rendered after zooming or refresh.

Actual behavior:
Lines become scrambled until the window is resized.

Priority: VERY HIGH
Workaround: Resize the window