Regression in psalm 5.10.0 on enum types

[lstrojny]

This example worked with 5.9.0 but does not starting with 5.10.0: https://psalm.dev/r/5fe87722dd

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/5fe87722dd

<?php

enum Bar: string {
    case A = "a";
    case B = "b";
   	public const STR = self::A->value . self::B->value;
}

class Foo {
	public const CONCAT_STR = "a" . Bar::STR . "e";   
}

Psalm output (using commit b99857c):

INFO: MixedOperand - 10:34 - Right operand cannot be mixed

[lstrojny]

Bisected the issue, ad5bf62 (#9373) introduced the regression

[ygottschalk]

Will check on that sunday / monday