problems with gray colors

good day forum, I have a problem with a latex L25500
happens when gray print out the inner part magenta spots should be emphasized that it is only in gray colors.
it does with new heads and use, the only way that we avoid cleaning heads is 3 or 4 times but returns later time,

I need your help

Thank you

Hi Megadesign,

I do not understand your issue at all. Can you please attach a picture of the issue?

thank you in advance