HFS-3 does not show all bars anymore?

[Matutino]

My HFS-3 system use to show almost all bars under full boost, lately it only shows the s and the b and thats it when spraying
Its set up with a 3bar map sensor to start to spray at about 13psi up to 15psi. Its also set up to follow IDC... the failsafe wont trigger and even though is set up to do so if the set up sees less flow.
Any ideas why I now don't see full bars?
Thanks