Unreal Engine Issues and Bug Tracker (UE-74453)

Steps to Reproduce

Create a class that derives from AActor.
Add a UPROPERTY(Editanywhere) of type uint64
Drag an instance of the class into the editor.
Enter a value of 9478101708308957265 into the spin box for the uint64 variable and press enter to commit the value.
The value will be truncated to 9478101708308957184 on commit.

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Won't Fix

Component	Tools
Affects Versions	4.22e0

SpinBox converts uint64 to double