Since update slowdown Kontact

[MERLIN Philippe]

Hello,
Since update Kontact 5.14.1 (20.04.0) , since the update the access and 
reading of the received messages is often very slow a message appears 
"Reception of the content of the message please wait" Same problem for the 
trashing of messages.
Do you have the same problem?
Cheers.
Philippe Merlin