Show preview offset - showing wrong result?

Show preview offset seems to show the result of applying the offset path filter twice.

It shows the right result in some cases, e.g. after using cmd+z, only as long as the cmd key is pressed and also while moving nodes.

Maybe this is a bug or I’m getting something wrong…

(MacBook Pro 2008, OSX 10.9, Glyphs Version 1.3.25 (526))

This is fixed in the latest beta version (you can try it by activating “show cutting edge version” in Preferences > Update).

Perfect! Thank you.