Midi loop plays only once

I’ve written a quite simple midi track of one bar. The midi output of this track is directed to Linuxsampler. When I set a loop and hit play loop, the loop plays only once and then the playhead starts again from the beginning of the loop but no sound is produced. Why ?

This bug seems to come and go. Every time somebody has reported it, it never turns out to be repeatable. If you have a 100% repeatable case, then please use the ardour-dev or ardour-users mailiing lists or IRC (see http://ardour.org/support) or one of the existing bug reprots about this to follow up.