Yeah I am still having the same issue, although I have now made a completely new project to resolve it.
Here is my dxdiag, the Logs folder is too big to upload here so would I be able to email it? I have attached the last few entries in the log folder.
Logs
The project this was happening in seems to be becoming more corrupt by the day and I am now only using it to salvage parts of my blue prints and some assets that are not linking to my corrupted character bp. The project only opens if I move the character out of the content files then load the project, then move it back in.
I have a feeling that the original corruption was due to copying and pasting blueprint nodes/chunks as when I recreated a completely new character class it still managed to corrupt somewhere along the way.
In my new project I have made a strict policy of no copy/paste blueprint nodes and it appears that I have all the functionality of the old blueprints but without the corruption.