Looks like there are silicone splatters on the media which prevent the ink to adhere.
Paco
Can you send a pic of that. Having issues again and we are thinking that it is low humidity. Only 22% in the shop. Tech said between 40-60%.please check and clean the air outlets upward platen heater and inside rail cover (middle cover after front cover) there are fans as exhaust ink fumes from there if the sponges located at the both end (left and right) may be block and fumes still remains their and formed Ink powder. that sprayed onto media... first put a waste media, please verify from hit it slightly surround the fan location... you will find a solution from this only.... have a great day ahead...