ArgumentTypeCoercion instead of MixedArgumentTypeCoercion emitted

If I understand correctly, MixedArgumentTypeCoercion is emitted when it's an iterable-specific issue, and ArgumentTypeCoercion is emitted in any other case. There are two ways to transform stdClass to an array: (array) $obj and get_object_vars($obj). In first case it will be a MixedArgumentTypeCoercion info, in the second case it will be ArgumentTypeCoercion error. https://psalm.dev/r/66737b481d

Looks like some inconsistency for me, or I can't understand some underlying logic.