Login of network users stopped working with Catalina update
Solution 1:
I hoping you solved this one. Just a possible solution here. Catalina system file system is now read only. Mount points are now restricted. I suspect the issue may be related to mount point problems. I have network users as well and I am having no issues with that. I did however have mount problems. All mounts must now be in
/System/Volumes/Data
So your mount point should probably be
/System/Volumes/Data/home/gk784
At this point most likely you will need to change user home folder locations. You can sym link but not to the root file system.
I would be curious to know what you did, if you did indeed solve this.