System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Worked: (optional)

Short description of error
I was previously in Blender 2.80 and working on a scene which involved textures being manipulated with the mapping node in the shader editor. I updated to Blender 2.82a to try a feature and in doing so, the file hasn't been the same since. The mapping node in the material included in the file is now "undefined" and doesn't do anything. The problem is that if I restart Blender, it might work once then not again until I restart my computer. For example: I restart blender and it's correct and accurately manipulates the texture. I then close it, navigate to another program, do whatever, and if I open it again, the nodes will be undefined and glitched. It seems to happen pretty frequently but occasionally, it will work fine and then glitch out. It's hard to describe...it's like it works or it doesn't. I'm sure adding a new mapping node to replace these could work but the problem is that I've had a scene I'm working on for a few months and I can't remember the settings. Is there a way to get the data from the old mapping node?

Exact steps for others to reproduce the error
Open the attached blend file

If it's functional, the shader editor will be on the left...I included a little carrot to indicate which nodes are having the problem.
If they're standard mapping nodes, try closing the program and opening it again (without restarting the whole system).
They should now be red, undefined nodes that just pass the UV data through without doing anything.