It seems that the memory leak were resolved thanks to reproducer you made Memory leak with Julia 1.11's GC (discovered in SymbolicRegression.jl) · Issue #56759 · JuliaLang/julia · GitHub
I consider it to be success on how quickly such a nasty bug was found and resolved. You may be able to try it out by installing Julia nightly now with juliaup or with the next patch releases when it will be available.
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