Add 3 gnd from stm direct to right panel via dasiy chain split each earth 3 way to each input only

[psmmacker]

Well when i wire my panels  like this i get flicking signals

But make me wonder if gnds need to each inputs of both panels one from the stm and 

Stm to dasiy direct  the other inputs stay like oe r1 r1 g1 g2 b1 b2 clock all stay the as wired

Only the earths gnd goe 3 from the stm and 6 out to panels 3 to left panel and 3 to right

Thanks

Paul