Are you updating component. Here is reference to xd help
Linked assets allow you to consume assets (components, colors, and character styles) from one or more design files available on XD cloud documents. Linked assets complement the workflow of linked components.
When a linked instance is used in a consuming document, you can use overrides (style and appearance, resize and layout, and structure) to customize the local instances in the consuming document.
If you modify and save the master component in the source document, a blue badge
next to each linked component instance in the consuming document indicates that an update is available. You can hover over the blue badge to preview the updates within theAssets panel, and if visible, on the design canvas.
Click the blue badge to accept the updates to an individual component and clickUpdate All at the bottom of the Assets panel to update all instances within the document. For more information on linked assets, see Work with linked assets.