(april 21 build though this has been the case for the last few releases)
When working with the pop up command dialog (themes pref-> Use command options dialog)
• click cursor in viewport for start point
• push the ‘4’ key
• realize you really meant to push the ‘3’ key so press the delete key
the 4 won’t delete so you have to exit out of the command and start over again… (alternate solution that i just realized is to hover the cursor over the text field in order for a text cursor to appear then delete)
deleting in the text field works properly in this scenario using the sidebar command dialog.