updateSettings does not update syncSlicers.visible in View mode for Power BI Embedded reports

Hi WellsFang 

This is consistent with how the Sync slicers pane behaves in the embed client SDK. Unlike filters or page Navigation(viewer-facing), sync slicers is an edit-mode authoring pane, so setting  syncslicers.visible = false  after returning to View mode has no effect — hence it stays "stuck."

Recommended workaround: Hide it while still in Edit mode, before switching to View:

----------------------------------------------------------
await report.updateSettings({
panes: { syncSlicers: { visible: false } }
});
await report.switchMode("view");

----------------------------------------------------------
Awaiting update settings before switch mode ensures the pane is hidden before the transition.
Alternatively, re-apply your full  panes  config as part of the mode-switch handler.

Thank you,
Srikanth Cheri 
CST Team