I have this happen in my saves, too. In addition to the grafted plant that produces the cowberries, I have a cowplant in my garden (from planting one of the perfect cowberries from the grafted dragonfruit-snapdragon-cowberry plant).
The grafted dragonfruit produces variable quantities of cowberries daily that have to be harvested. This is a perfect plant, so the cowberries are worth $500 each
I also get 3 cowberries added to my household inventory (in build mode) every day. They are also perfect, but worth $900 each. I've never had any just show up in my sim's personal inventory (without harvesting them)
I'm not sure it's a bug, I assumed this is the way the cowplant has a "harvest".
I quit selling them for a while and it seems like they stopped appearing after I got 21 cowberries in my household inventory. I'm testing a few different scenarios now, to see if I can replicate it in saves that are not my legacy challenge. 🙂
@pettoii - A couple of questions to help with my testing - do you have any plants in your household inventory at all? If yes, what are they? What quality is your grafted plant (normal-nice-magnificent-perfect)? What quality was the cowberry when you planted it for the cowplant? What is the value of the 3 cowberries from the inventory?
I can replicate in base game & freebies, no cc or mods / never used. Have not updated game to April 7 2020 patch yet.
