I tried rendering my first project after the new update, and it is giving me trouble already. It doesn't render anything, no matter which codec you use or if you use the GPU or not, including timeline GPU. The render dialogue doesn't show any data being written to disk, though the frames are counting through on the preview. If you try to use NVENC, the frames jumble up and the render freezes quickly. If you use CPU only, it will act like it is rendering, but disk activity is at zero and eventually it crashes.
The Media is:
A few clips from a GH4 at 4K UHD 100mbps mp4 codec, 23.97 frames per second
A few clips from a GH5 at 4K Cinema resolution 150mbps 10 bit 24fps (accidentally didn't use UHD 16:9 like I usually do)
An AE animation rendered to quicktime uncompressed at 24fps, UHD resolution.
8 bit UHD 24p project
Changing render template from 4K X fps (whatever the codec has available) to 24p to match my project settings.
Ryzen 7 1800x
GTX 970
Win10
Media + Project (This is a promo for our water screens I am editing, shot at Suwannee Hulaween's Spirit Lake art installation last weekend.):
https://drive.google.com/open?id=12rI9Ra9I8BJTUj5YSS7r4WjCPAT4Ozx8