greater regrowths base heal is lower than regrowth

[lavish bane]

Greater Regrowths base heal seems lower, or not factored in at all, than regrowths, while the ticks seem to be the exact same.

testing: cast each of them on myself, while waiting for the first to wear off before casting the second.

[glossy fractal]

got something similar 'just' got that spell and the heal per tick is the same as regrowth for me 380 hp a tick at lvl 19 with 171 int and 152 wis