In v0.18.0 garden.rpa is 168 MBytes. In v0.18.1 it is 206 MBytes.
It seems to me OP had version 0.18.0 patched to 0.19, and so ended up with that older version of garden.rpa, like OP suggested.
It should be made clear the patch “HH v0.18+ > v0.19.1 PC Patch” must have HH 0.18.2 as base.