It works, but some problems

I use this app with my iPad. One problem is that I always have to reconnect the printer to my LAN in order to use iPrint&Scan. The second problem started after the recent app update. When I try to email the output of a scan, it opens my mail program, but the mail program then closes after a few seconds. Emailing used to work just fine.

RandomCharacter about Brother iPrint&Scan, v4.3.1