The content of my notes are mainly in Chinese.
A:
Created a new reference link item, officially named “Rem”? (e.g. “笔记”) when typing characters (double “[” ,or select the characters and type “Ctrl+Enter”), it was the first time that one reference item (“Rem” in Documents) had appeared in the Documents list (include Top-Level Rem).
After minutes or hours, even days, I typed the same word “笔记” and going to make it a link by double “[” or select and “Ctrl+Enter”, then I found that there were 2 reference items (include Top-Level Rem) named “笔记” in Documents list.
There are more than one word/phrase that has two same Rem items.
-Is this a bug that only appears in Chines content? If so, how to get rid of it or avoid it? Thanks!
B & C & D:
Following are my operations that bring me the matter:
Moved one reference documents (include Top-Level Rem) into another;
Content got confused, tried to undo MOVE but cannot find out how;
Found a function named “turn into normal portal” and used it;
Content got confused more;
Deleted content in this portal documents;
Deleted this documents (Rem) in Documents list but failed, app/browser got frozen/crashed;
Every time click Documents tab, app/browser will freeze.
Other users noticed one of my problem in topic 4611
https://forum.remnote.io/t/attempting-to-delete-document-remnote-freezes-completely/4611/,
but the portals or documents in my database cannot be deleted yet when unsorted.
PS:
NOW, once I click any place on the interface, it freezes. I can use RemNote for nothing, and it even slows down my browsers, Firefox, Edge and Chrome 
Interface of the app/browser shows below:
