Bad generated type in class auto-implemented member (Typescript)

Hello,

I have a problem with the way webstorm implements class methods based on a type witch contains a template literal. This behavior happens when implementing an interface in a class or implementing members in an object. Here is an example:

what happens :

export class Aclass implements ControllerGenerator<'classmodel'> {
    connect<K>(body: Api.BodyT<`/api/${"projects"}/${"connect"}`>): Promise<Api.Returned<`/api/${"projects"}/${"connect"}`>> | Api.Returned<`/api/${"projects"}/${"connect"}`> {
        return undefined;
    }
}

what is the wanted output :

export class Aclass implements ControllerGenerator<'classmodel'> {
    connect(body: Api.BodyT<`/api/projects/connect`>): Promise<Api.Returned<`/api/projects/connect`>> | Api.Returned<`/api/projects/connect`> {
        return undefined;
    }
}

here is the type definition :

export type ClassGenerator<T extends AllControllers> = {
   [K in Endpoints<T>]: (body: BodyT<`/api/${T}/${K}`>, req: { user: { userUid: string } }) => Promise<Returned<`/api/${T}/${K}`>> | Returned<`/api/${T}/${K}`>
}

export type FormatRoute<T> = T extends `${infer A}/${infer B}` ?
   (T extends `${infer C}/:${infer D}` ?
      `${Lowercase<C>}${Capitalize<D>}` : `${A}_${B}`) : T extends `${infer Total}` ?
      Total : never;

export type FormatGenerator<T> = {
   [K in keyof T as FormatRoute<K>]: T[K]
}

export type ControllerGenerator<T extends AllControllers> = FormatGenerator<ClassGenerator<T>>;