So I have a rounded corner, with a union to fill in the gap, however the appearence differs between in-game via roblox website, and studio testing mode.
In studio and studio testing, the union appears in the correct place:
(Studio)
(Studio testing)
However when you go in the game on roblox, it appears incorrectly:
(Roblox via website)
This seems to be an issue with your union… separate the union and make sure each part is anchored before you perform the union, it isn’t enough to anchor it after it has become a union or it causes issues like this sometimes.
I probably should have tried this sooner, redoing the union fixed this and now I am unable to replicate it, not sure why it happened in the first place but it’s solved now.