error on text tool

Steps to reproduce:

• open Inkscape
• ...

What happened?

when I use the text tool, from time to time, I can not write anymore, the processor grows out of nowhere, and I can no longer write a text nor when I want to export it does not accept the keyboard, and it often closes the program when I'm typing, and it only re-accept the text after I close and restart the program.

What should have happened?

I should be able to write the text normally

Inkscape Version and Operating System:

• Inkscape Version: 0.9.2.4
• Operating System: debian
• Operating System version: buster