Thanks for the rely @spikeyxxx
Yeah it is really weird , I’ve only noticed it this past few weeks but it is making using Blender a real drag for me.
Just out of interest , if you VP render in Cycles , and change the strength or colour of a light , does it make the changes in realtime or does it start the render over and have to re-initialise? Same if you click or move a node in the node editor?
I think the best thing for me is to compare others experiences and see if I can troubleshoot.