Chrome Version: 62.0.3202.63
OS: Chrome

1. Be on a slow network connection
2. Open the Launcher and type something that should return an app as well as Google results, e.g. "chro"
3. Right-click the first app icon that appears

Expected: The context menu opens and remains open until user action.
Actual: The context menu opens and quickly disappears.

Seems like the context menu disappears whenever there's an update/addition to the search results below the app icon, which is why it's more pronounced on a slower connection. Adding rows to the search results shouldn't affect the context menu for an app icon in the top section of the launcher.