TextMesh Pro Korean character disassembled issue : I got ᄋ ᅩ ᄂ ᅳ ᆯ but want it as 오늘

Hello,

First, I am not a Korean speaker, so I am merely trying to understand what's going on here.

My issue :
I got as an input string some Korean character, I paste them here : 오늘날씨가좋아.JPG
No issue ? Yeap thank to my windows OS or chrome or whatever that re assembled them, because what I Copy/Paste from is as depicted in Unity.


And my TMP components are not able to display them assembled either, so if I don't want to see squares, I need a fallback font with disassmbled character (but that don't help Korean people at all).

FYI, the origin of my trouble came from getting files from a certain OS with a fruit, that is the original reason why my 오늘날씨가좋아 user file name became ᄋ ᅩ ᄂ ᅳ ᆯ ᄂ ᅡ ᆯ ᄊ ᅵ ᄀ ᅡ ᄌ ᅩ ᇂ ᄋ ᅡ in the first place (I added spaces here to be able to CopyPaste the disassembled string in the forum).

Any help or hint on how I can handle the situation would be most welcome.