[Bug]: IgcBubbleSeriesComponent - The bubbles disappear from the chart plot area with fillScale, markerOutlineMode and highlightingMode settings

[norikois]

Which component(s) are affected?

Other/unknown (please specify in the description)

Description

The bubbles disappear from the chart prot alea with fillScale, markerOutlineMode (MatchMarkerBrush) and highlightingMode settings.

Reproduction

1. Start the attached reproducible sample. Keep watching the bubbles in purple gradation.
2. Click 'Toggle Highlighting' button and mouse over one of the bubbles.

Actual:
The purple bubbles disappear.

Expected:
The purple bubbles are kept displayed as they were displayed at the beginning.

C00245706-wcBubbleChartApp2.zip

Workaround

For just avoiding from disappearing, markerOutlineUsesFillScale="true" could be one option.

Is this a regression?

No or unsure. This never worker, or I haven't tried before.

Affected versions

igniteui-webcomponents-charts 6.3.1

Browser/OS/Node environment

Browser: Chrome 145.0.7632.160
OS: Windows 11 25H2
Node version: v24.0.0
npm version: 11.3.0