Bug report

When using isset() or array_key exists() on multidumensional array, array shape is somewhat lost.
PHPStan 1.8.2 was fine though.

Code snippet that reproduces the problem

https://phpstan.org/r/4237e5f0-169f-44a4-8bd9-1970b08924bf

Expected output

There should be no error since both bar and foo keys exist, however dumped type misses the foo key

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