Weird line of sprite with Mega Everdrive X5

Hi, I just received both mega and super everdrive X5. I noticed I have this visual glitch with the Mega ED X5 while the Super ED X5 is working flawlessly. I was wondering if anyone has experienced this problem before me. It annoys me quite a bit, cause it catches my attention.

It appears often when pausing and resuming the game and it is even noticeable during sega logo in some games.

Could my everdrive be faulty and do you think I should try to get a replacement at krikzz ? Any help would be greatly appreciated!