LinkPi ENC1V3P Display Logo Change

Good morning, on the LinkPi ENC1V3P I can't change the initial logo on the LCD display. 
The procedure I follow is always the same as for all LinkPis, and the logo.bin file
I use is always the same. I noticed that unlike other encoders, the UPGRADE text is displayed upright and not upside down, 
but I don't think that's the case, because I also tried to generate the logo in reverse. 
I use OledTools to generate the logo.bin. 
Could it be no longer compatible? 
Can you recommend a solution? 
Thanks, Marco.

Please contact the business staff at the store where you purchased the equipment to communicate with support. thank you.