I cannot reproduce your results with 5.32.0, 5.34.0 or 5.36.0, I get a "deep recursion" warning in every case. Do you have environment variables or an init script that could be suppressing it?

v5.32.0
Deep recursion on subroutine "main::recurse" at testfile line 11.

v5.34.0
Deep recursion on subroutine "main::recurse" at testfile line 11.

v5.36.0
Deep recursion on subroutine "main::recurse" at testfile line 11.

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I don't have 5.32.1 handy, but I'd be astonished if this had been broken.

In reply to Re^2: Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by hv
in thread Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by mldvx4

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