RichEditor is slow when paste many text

FNC TMS FNC UI Pack
1

Used: Delphi 11, windows 10 , firemonkey project , FNC controls version 4.1.0.2

  1. I put into form one FNCRichEdit control.
  2. Run project
  3. Copy text from at pdf file from internet like this:
    https://isfd810-chu.infd.edu.ar/aula/archivos/repositorio//500/633/Historia_Clinica.pdf
  4. When try paste into RichEditor I can see the next error:
    " Argument out of range "
  5. Control becomes slow and unresponsive
3

I cannot reproduce this.
Selected all text in 2 page PDF and paste via Ctrl-V.
See recording.
fncricheditor