Adjustment lag using external monitor with 4.3

I have an Eizo external monitor connected to my MBP and use the external for editing.  I have been doing so for a couple years now and with all versions of Lightroom (even 4.2).  I have always been able to see the changes/edits real-time on the external monitors when adjusting something with one of the LR  sliders. Ever since I installed the latest LR update (4.3)- I don't see changes realtime. I have to wait until I let go of the mouse/slider to see the changes/adjustments.   Anyone else having this issue? Is there something g I can do to fix it?

I believe that change was made in order to improve performance in the Develop module.  If it's causing a problem in your workflow, you might like to report it here: Official Feature Request/Bug Report Forum

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