filterSuggestionItems doesn't work when typing Korean

[lbybrilee]

Describe the bug
Once the suggestion menu is triggered, when you start typing in Korean, the menu will close and will not filter. Same issue persists with other trigger characters as well.

For example, when I type, "/image" the image block suggestion is filtered. However when I type /이미지, the the suggestion menu closes.

To Reproduce
Issue can be simply reproduced by adding dictionary: locales.ko to the basic useCreateBlockNote function. I've recreated the issue in the basic stackblitz by doing this.

Misc

• Node version:20.11.1, npm: 10.2.4
• Package manager: npm
• Browser: Chrome

[matthewlipski]

Just to make sure - can you check that you're on BlockNote version 0.15.7? There were a few fixes to composing languages recently and I also can't seem to replicate the issue with typing /이미지.