The painter measured the glyph with TextStyle(color = Unspecified) and
tried to override the color at draw time via drawText(layout, color = tint).
That override is unreliable across Compose versions: when the measured
style carries Color.Unspecified, drawText can fall through to Color.Black,
producing black-on-black icons (visible on the back arrow in dark mode).
Include the tint in the measured TextStyle directly. The (symbol, fontFamily,
density, tint, rtl) remember key on rememberMaterialSymbolPainter was already
keyed on tint, so the TextMeasurer cache still hits for every (symbol, color)
pair used by the app.
Claude
15e63c48a2