S-UltraGlow resize Mocha XY?

Hi, in this clip i have S-Ultrazap lighting a neon sign, no prob there :+1: (top track is a duplicate & has Mocha just for a mask for the finger so the zap isn’t on top)
around it i wanted to add a bit of glow, so on the second track, same as the zap fx i added S_UltraGlow, used mocha to isolate the glow to a circle around the light, back in the host i decided the Mocha isolating mask should be bigger, expanding the mask using Resize Rel X seems to expand equally left & right :+1: but Resize Rel Y seems to only expand upwards not in both directions up & down?
Is this right?