Apparently, for Loop not to crash, I have to issue the Loop command individually for both [0] and [1]:
Code:
vfx00[0] = core.std.Loop(vfx00[0], times=118)
vfx00[1] = core.std.Loop(vfx00[1], times=118)
So my code will get more tedious since I have to deal with 88 different VFX frames.