LyX 2.3.4 - Freezing cursor

[F M Salter]

Replying to Pavel and Daniel

     It is happening in one document.  Also ^Z does not work after 
freeze. Only clicking with mouse unfreezes.

     in a new document it does not freeze.

     Desktop is KDE.  QT version is 4.8.7

Thanks Frank

On 31/01/2020 09:18, F M Salter wrote:
> Hi,
>
>     Cursor freezes after alt-I H D etc  Recovery is by clicking with 
> the mouse when the cursor unfreezes and  the cursor can be moved to 
> correct position,
>
> Regards
>
> Frank Salter
>