Switch Treasure Appraisal Guide skill not working

Phroomie

Newcomer
I play split screen switch with my sister as the secondary farmer. I found the “Treasure Appraisal Guide” book and read, which gave me the skill and the icon is lit up in my skills tab. When I first got it, the skill was working and I was selling artifact items at a higher price, however I noticed a season later that the same item I had sold originally for 300% more was selling at normal price again.

I wonder if it’s also attached to the fact that recently, at the end of the day, I either do not get any end-of-day-sold/profits list but my sister (the primary farmer) does or if I do, I only see 1 or 2 items sold, even if I personally put them into a shipping bin.

I have the fully updated version of Stardew Valley on Switch as of this date
 
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