​Hi, We have noticed that the buttons for SPFx ListViewCommandSet extensions are not appearing in the command bar for lists when the Microsoft Lists-style UI is displayed. We first noticed this in one of our production extensions, but have also reproduced the error with the ‘HelloWorld’ example from the official ‘Build your first ListView Command Set extension’ article. The following behaviour is encountered: 1. Default SharePoint Microsoft Lists-type UI displayed when opening a list in SharePoint – ListViewCommandSet button is not displayed. 2. Microsoft Lists UI displayed after pressing the ‘Open in immersive mode’ button from the default SharePoint list UI – ListViewCommandSet button is not displayed. 3. SPO Modern lists UI displayed after pressing the ‘Open in site’ button from the Microsoft Lists UI – ListViewCommandSet button is displayed.  This is surely a bug, as the extension used for testing was built with the most recent version of SPFx (version 1.19). Are Microsoft aware of this and are they investigating a fix? Is there a known workaround for this issue? Thanks.  Read More

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