Animation Blueprint - Variables Set in EventGraph are None/Null in EventGraph

I am currently running into an issue where all member variables of an animation blueprint that I set in the EventGraph are none/null in the AnimGraph. This makes it impossible for me to use these variables to my animation nodes.

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I tried creating a UAnimInstance class, reparenting the blueprint and then setting the variables in C++ but this did not solve the issue.
Has anyone encountered this before or found a way to solve this?

Currently running into the same issue. Help would be highly appreciated.

For me this issue was where I was not initalizing the base node class. I would check if you could add the following code to you Initalize_AnyThread;

FAnimNode_Base::Initialize_AnyThread(Context);

Hopefully, that helps!