Bot post the welcome message if the label is changed after PR is closed. Status and Checks are reset once PR is closed, so bot can't check if the bot already posted a welcome message. Now if user changes the labels, it's going to post welcome message, assuming it's the first time it's posting the message.
Bot post the welcome message if the label is changed after PR is closed. Status and Checks are reset once PR is closed, so bot can't check if the bot already posted a welcome message. Now if user changes the labels, it's going to post welcome message, assuming it's the first time it's posting the message.