Sure thing.
Monitor
Samsung CF791 Series 34-Inch Curved Widescreen Monitor https://www.amazon.com/gp/product/B01M1D7JVO/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
USB-C Hub
Wavlink Universal USB-C/USB 3.0 Ultra 5K Laptop Docking Station with 4K Dual Video Outputs ,Support for Windows 7/ 8/ 8.1/ 10(USB-C in,DP and HDMI,Gigabit Ethernet,Audio out and Mic in,6 USB 3.0 Port) https://www.amazon.com/gp/product/B06Y5B7BDD/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Resolution and scaling
3440 x 1440
Refresh Rate 50 Herts
Preferences -> Performance (Do you mean energy saver) -> Display
Power Adapter
Turn off display after 10 minutes
Put hard disks to sleep when possible
Wake for Wi-Fi Network Access
Enable powernap
Graphics Displays Under System report
Chipset Model: Intel UHD Graphics 630
Type: GPU
Bus: Built-In
VRAM (Dynamic, Max): 1536 MB
Vendor: Intel
Device ID: 0x3e9b
Revision ID: 0x0000
Automatic Graphics Switching: Supported
gMux Version: 5.0.0
Metal: Supported, feature set macOS GPUFamily2 v1
Gotcha, I think you were talking about within Affinity Designer.
Ok, now when I open with my Dual monitor it is working again, so I am unable tot test if changing to Metal will solve. If it stops working again I will try it.
Affinity Photo is working again as well. My experience has been when one stops so does the other. If it stalls again I will try both apps and report back.