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Single instance instantiated object is recycled?

As shown, after about 20 - 30 seconds, the instantiated object becomes None.

code:
2

why?

Please help me, think you

That object is being garbage collected because your reference to it (your static variable) is not visible to the garbage collector (because it isn’t & can’t be a UPROPERTY). The most immediate solution to this would be calling AddToRoot on Util after you allocate it, but it has it’s downsides.

A better solution for this (and other singleton-like objects) are the subsystems. You can create them at a few different scopes. I haven’t used them myself yet so I can’t really help with any implementation details, but I know they’re out there and they would work for this type of access pattern.

Thank you very much