In some cirmustances when long text is pasted to to InputField and copied to clipboard, it in some situations got truncated to 200 characters. When debugged with "Inputfield.text" the text was the same, however when inputfield was interacted in VRChat the 200 character truncated text was shown.

Changing the Input Field's linetype from "Single Line" to "Multi Line Newline", fixed the bug for me.

This only started to happen in VRChat recently and I had no problems in Unity Play Mode.