LyX 2.3.4 - Freezing cursor

[F M Salter]

I am enclosing  a minimal example

Regards Frank

On 01/02/2020 16:00, F M Salter wrote:
> 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
>>
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