This is due to the proportion of Edge Sizing. It seeks to correlate a ratio with the size of the domain. Try replicating exactly like the link I submitted. Use even the same domain size and replicate size limitations. See what happens.
I do not think I have the file with the mesh here, I'll take a look. Try to do this and share here if you have succeeded, if not, I search my files and show you.
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New Post - Reply To: Converge the numerical result