Journey core has graphical glitches

[gkralicek]

In the level of the game where the guitarist has to reach his instrument at the top of the screen by climbing up on elevating platform, once he reached the instrument, the game turns into a shoot'em up and there are canons appearing on the platforms. The ones on the left side of the screen are glitched and instead of canons, scrambled whitish squares are drawn. (See picture attached). I first thought it was a problem with my ROMs being bad so i tried other ones but everytime i encounter the same bug so it must be core related. FYI the bug is also present on the same level in the attract mode of the game so you don't even need to play to visualize it.