Having issues with Mailbox app; anyone else?

Hi All,

Something has been driving me crazy lately with the Mailbox app, and I cannot find anything about it online. I'm having intermittent issue with the "delete" button when inside of a message. At random times the delete button will simply not work...it changes red when I push it, but then nothing happens. I have to back out of the message and swipe to delete.

I just wanted to see if anyone else was having this issue or if I'm going insane. Thanks in advance!