Slow performance on Big Sur

[J. Landman Gay]

My client is running Big Sur and says that changing cards in a stack causes a very slow, 
stuttering display. The background image appears in chunks and text in the fields comes in as 
sequential pieces. The order of the display varies, sometimes the text appears first, sometimes 
the background image. The first few cards are fairly normal, but as she pages through the stack 
it gets slower.

I had her watch Activity Monitor and CPU usage goes up as she navigates through cards. At first 
the display is fairly normal but each successive card change increases CPU useage a little bit. 
She stopped when usage got to about 50% when she said it was unusable. This was in the IDE. She 
says the standalone is even slower.

Has anyone seen this? On Mojave and Catalina everything is fine.

-- 
Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com