Digitone Keys : Modulation won't save

Hi fellow modulators !

I’ve been enjoying the Digitone (Keys version) for a few months, and lately I’ve noticed that some of my patches won’t save the modulations I’ve set upon them.

It doesn’t happen for the sounds in Sound Manager, only on tracks, even if I save the whole project, sometimes it’s recalled when I reboot the device, sometimes not.

Have any of you already encountered this bug ?

Thanks !