Iconica notes dropout

Hi,

I’ve got Iconica ensembles loaded into Halion 6 using midi tracks. When isolated, each track can play correctly. But when playing together, these tracks, each using their own channel in Halion, will occasionally have notes silenced. Every time they are played, there is a chance that notes will be silenced here and there. It is not about buffer as the audio performance is far from its maximum.

Does anyone happen to know what’s going on?

Thanks,
Simon