Weird, everything looks like it should... does draw_flush exist in your version of GM? If it exists you should call that alongside d3d_transform_set_identity in triangles_break_batch (and maybe in draw_self_enemy as well) just to make sure the draw pipeline gets flushed.
I would recommend looking into it if it's an option, GMS1 hasn't had official support in years and it's only a matter of time before its old graphics APIs will stop working entirely... :(
Currently the free license lets you export games to desktop platforms if the game's not sold, so there's basically nothing to lose just trying it out. (And I'd recommend getting GMS2 from the official download page since it's literally free)
