Bug: Legend changes to "(Blank)" when Initial Scroll Position is set to End

Hi eloibf​,

Building on the workaround above: if you need both "End" scrolling and custom colours, you can avoid the trigger entirely by not using per-category formatting at all. Per-category colours are stored as selectors on each legend value, and that write is what seems to break with End. Two alternatives that do not create those selectors:

1. Colours from the theme, ordered to match your legend sort:

{
  "name": "Legend colours",
  "dataColors": ["#1F77B4", "#FF7F0E", "#2CA02C", "#D62728"]
}

2. Conditional formatting (fx) on Columns > Colors with a measure, if the colour must follow the category name rather than the order (availability depends on the chart type and whether a legend field is used, so check your visual first):

Category Colour =
SWITCH (
    SELECTEDVALUE ( 'Table'[Category] ),
    "A", "#1F77B4",
    "B", "#FF7F0E",
    "C", "#2CA02C",
    "D", "#D62728",
    "#999999"
)

If a visual is already broken, check for and remove the per-category colour overrides (Reset to default on Data colors) before re-applying End. And since you have a clean repro in both Desktop and Service, it is worth posting it on the Fabric Issues / Ideas site or a support case so it gets tracked.

So my overall approach would be:

Reset per-category colours on the affected visual
-> Apply colours via theme dataColors (or fx measure)
-> Set Initial Scroll Position = End
-> Report the repro so the selector bug gets fixed

AI-assisted drafting: AI was used to help structure and phrase this response. I reviewed and validated the technical content before posting.