Bluetooth midi: lag on the first note.

[Zibri]

I have noticed this and sincerely I am not 100% sure it's a bluez problem or one of the many Roland problems, but I have setup a linux box to act as a bluetooth midi piano and everything works using alsa aconnect and fluidsynth; the problem I have noticed is that the latency is pretty decent when playing but if I stop playing for a few seconds, the first note I play after the pause is lagged very noticeably.

My idea: no matter if it's bluez or Roland's fault, but is it possible to continuosly send a "NOP" sysex or mute note to the source as a keep-alive?