Rmx scaler crashes on some glyphs

Using the RMX Scaler on some glyphs makes Glpyhs.app unresponsive (beach ball). Other glyphs work smoothly.
But if I delete all all other glyphs from the file, it runs fine. Do anyone have any hints?

3.1.2 (3151)

What version of RMX do you have?
Can you send us the file?

Sent to info@,

The issue seems to be fixed in the latest cutting edge version.