Some keys do not work in PSI Browser

I could not use : key during the session. It would sometimes work, sometimes not. The problem had nothing to do with my laptop, outside of the psi browser the key : is working just fine. I did not have any problems in killershell. I think you can all image what it means for the exam, when you cannot properly use : and vim.

I can only say, that the most important keys should be tested in the chat in psi browser to make sure they are working fine. Something should be done about this issue.