RootCauseunvalidated
In newer MUI-x chart versions (7.16.0+), the internal tooltip styling class structure changed, so selectors like `.MuiChartsTooltip-root` no longer match the actual rendered element. The correct element to style is now associated with `.MuiChartsTooltip-paper`.
ee898c83-dcde-4dac-82e8-f41eb1c2dcb8
In newer MUI-x chart versions (7.16.0+), the internal tooltip styling class structure changed, so selectors like .MuiChartsTooltip-root no longer match the actual rendered element. The correct element to style is now associated with .MuiChartsTooltip-paper.