Show email labels (resolve this issue) read for more details

In those days I'm receiving spam and MailBird show me the number of unread mails into the spam. I get into the spam and I report abuse for every spam email than I assign to the email a label from MailBird (label was created before in Gmail) but after i reload MailBird and goes into spam and check if email has label of not MailBird doesn't show emails are with label. I see as no label has been assigned. Please FIX. I reported this issue on ticket and you suggested to post here.