(SV) Characteristic displayed by PKHeX doesn't match the one shown in-game

[Solarc]

I've done this countless times before using gen VI and VII saves with no problem: I switch to a neutral nature, set all of my IVs to be the same value (in this case 0), and then reroll the EC until I get the characteristic I want. Most recently I got "Likes to run" for Sprigatito, but upon loading the save it shows as "Loves to eat" in-game, I made sure to double check. The issues reported in these recent threads sound pretty similar to mine:

 

 

 

 

[Kaphotics]

Set the pokemon back from the editor tabs, into the box/party.

[Solarc]

Yeah, I'm certain I'm doing that part of the process correctly. I'm changing the nature from Lax to Serious and then the characteristic from "Mischievous" to "Likes to run," the former works as intended while the latter keeps showing as "Loves to eat."