Found the exact routine on which Robocop 3 uploads the missing gfx data:
00BEEA: BF 00 80 06 LDA $068000,X
00BEEE: 8D 18 21 STA $2118
00BEF1: BF 01 80 06 LDA $068001,X
00BEF5: 8D 19 21 STA $2119
00BEF8: E8 INX
00BEF9: E8 INX
00BEFA: E0 00 40 CPX #$4000
00BEFD: 90 EB BCC 00beea (-$15)
Seems fine and such, guess it's something to do with vram address ...
