Connection drops + loss of umlauts

1keyboard looses bluetooth connection to iOS devices as soon as you switch to another application on your Mac. This is bad because users often need to copy texts from several applications on the Mac to the iPad or iPhone. Users cannot open those Mac apps without loosing the 1keyboard connection.
Theres no copy&paste support for umlauts: Typing umlauts transfers them to the iOS device correctly. BUT: Copy&pasting a text with umlauts silently removes all umlauts from the text.

TuxReview about 1Keyboard, v2.6