Good morning! I have two items to report, which may or may not be related to each other.
1. I got 2 cauliflower crops from one plant. I exited to desktop and returned to the game and it did it again each time I attempted to replicate it. I am not able to record a video of it with my setup at the moment, but I took several screenshots to show that one plant gave 2 items.
SV Version: v1.6.8 build 24119 according to my game today.
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Windows 10, PC, Steam, Single player. Completely unmodded; thus far I'm a vanilla-only player.
I did start this game with an extra cabin on the farm, but there have been no other players in this world but my single account.
I checked %appdata%/stardewvalley/errorlogs before/during Spring 20th (Year 1) but there were no error log files there. I'll play through the day and edit this post if any appear after the 20th.
2. I did not get a screenshot of this second issue. It occurred in this same save file shortly after the egg festival. I had planted the 30 spring seeds from the CC center bundle rewards and a crop fairy blessed me on several of the spring seeds (inconveniently not on my brand new strawberry seeds lol). However, the "blessed" crops did not appear visually grown and ready for harvest in the morning. I went about to water them, assuming that crop fairy dust did not work on spring seeds, but they were harvestable and appeared in my inventory - yay! I thought it was odd that they didn't reflect being full-grown visually like the rest of my "unblessed" spring seeds did several days later.
When I ended up getting 2 cauliflowers from one plant several days later, I decided it was worth noting in a bug report. I marked the general area of the crop fairy in the screenshots of the double cauliflower harvest. By normal crop fairy margins, it should not have affected the cauliflower plant in any way.
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Observant eyes will notice the 30min in game time elapsed between these two screenshots. I have my "swap inventory bar" bound to the R-shift key and I was taking screenies with "Win+Rshift+S" so it kept moving the inventory bar and I re-took this one about 3-4 times before I got it to take of the correct inventory bar lol. I'm typing this post instead of playing my game (which is very fun) and I have no reason to fake a bug report here lol.
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Have a good day!
Edit: after looking on the SV wiki, I think I should note that the crop fairy actually targeted a Carrot seed planted in the middle of my spring seeds. I forgot that detail until now. :)