Errors related to `SplObjectStorage` in 2.1.34

Bug report

After updating from 2.1.33 to 2.1.34, PHPStan started to incorrectly detect the type of the value during iteration.

Code snippet that reproduces the problem

https://phpstan.org/r/bb21e577-5851-4650-8d20-0953db1ef5b1

Expected output

PHPStan should correctly recognize the type of $value

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