False negative when quoted type appears in union syntax with UnionType operand

[brianschubert]

Describe the bug

Pyright does not reject quoted types in union syntax when combined with a UnionType operand.

Code or Screenshots

[pyright playground]

x1: int | "str"          # E: Union syntax cannot be used with string operand; use quotes around entire expression 
x2: int | str | "bytes"  # Runtime error, no pyright error

U: TypeAlias = int | str
x3: U | "bytes"          # Runtime error, no pyright error
x4: "bytes" | U          # Runtime error, no pyright error

Command-line

$ pyright example.py
example.py
 example.py:1:11 - error: Union syntax cannot be used with string operand; use quotes around entire expression (reportGeneralTypeIssues)
1 error, 0 warnings, 0 informations 

$ pyright --version
pyright 1.1.389

[erictraut]

This isn't really a type error, but I think it's a reasonable enhancement request.