Animation tool preview slower than at runtime after duplicating nodes

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:bust_in_silhouette: Asked By Footurist

So, I began making plugins a few days ago and now I’ve encountered a weird problem.
I made the plugin by copying the children of the original scene in the new node type via script. Everything works fine. However, in my tool I can preview animations via setget, which works but for some reason the preview is always half of the speed at runtime. I checked everything, no duplicate nodes, no wrong values. I even logged all values, that ran through the setter function and they were literally just the same. I suspect the copying of the node hirarchy is the culprit, though I don’t know how. Any idea?