Unable to define class fields after update to FDK 9.6.0

I am currently working on a custom app that uses multiple helper classes.
Here is a very simplified example:

class View {
    variable1 = "Test"
    variable2 = "Test2"

    doSomething() { }
}

Since updating to FDK 9.6.0 I now get the following error when trying to run my app:

Lint errors:
:heavy_multiplication_x: app\view.js::2: Parsing error: Unexpected token =

We will check and get back on this @chrism , cc : @Kishor_Muruganandham

Hello @Chandiramouli_Ramach @Kishor_Muruganandham,

Do you have any updates on this topic? Can you confirm whether this issue occurs for others as well?

Best regards
Christopher