Maybe the observation is in some way related to Accessing IChartSeries.Name.AsCells Getter Modifies a Presentation Chart - #6 by andrey.potapov. But the effect is more severe because there is not obvious workaround.
A u…...Family slides-net , slides-chart co213 February 3, 2026, 1:34pm...Getter Modifies a Presentation Chart - #6 by andrey.potapov . But...