TInlineAllocator can't be Uproperty() so my array is garbage collected ?

[DaveTheFreak]

Even though it’s a few years later:

TArray<TStrongObjectPtr<UFZ_Cell>, TInlineAllocator<100000>> Cells;

You could also use TSharedPtr, but the TStrongObjectPtr is best for UObjects while TSharedPtr is more for default types like int, float etc.