Hello, my VM fusion 12.1.2 is running very slow on Big Sur 11.5.2 when I am not connected to an external monitor. It has been very annoying to type on my 3270 terminal that use to work, while I type the keys got stuck and is only released when I press another key or click with the mouse. I tried to increase/decrease number of memory processors, enable/disable side channel migrations and hypervision applications with no success.

My computer is a MacBook Pro 15-inch, 2,6 GHz 6-Core Intel Core i7, 16 GB 2667 MHz DDR4 and AMD Radeon Pro 5300M 4 GB
Intel UHD Graphics 630 1536 MB.

My VM Fusions works with no issues only while I am connected to my 4k 27" external monitor, even using the retina display as a dedicated display to VM. This is very weird because the monitor should make the computer heavier, I could not find what changes on the VM configuration when my monitor is connected.

Any clue on this?