TaintFlow not picking up on implicit toString()

[edkazcarlson-ms]

Hello,
When the this keyword is used in an interpolated string with no property identifiers/ methods, C# treats the this keyword to implicitly be this.toString(). In testing, doing $"{this}" and $"{this.toString()}" result in the same string, however CodeQL only seems to be detecting the taint flow with the version with .toString() (see attached file). Can a future release of CodeQL please fix this so that we can properly track taint flows when they pass through fields that are used in the toString() method? Thank you.
Attached zip