Two $ref containing "~1" (escaped slash) cause "Invalid reference token:"

Describe the bug
Redoc shows an error screen when,

• there are two $ref pointing external file (I'm not sure about more than two)
• both of them include ~1, escaped slash character, in its JSON pointer tokens
• both of them referencing different files (or JSON pointer tokens?)

This does not happen if the value of two $refs references are same or the path does not include ~1.
The error message for

$ref: "./responses.yml#/StringResponse/application~1json/schema"

is

Something went wrong...

Invalid reference token: application/json-schema 

(Reproduction CodeSandbox)

Expected behavior
Docs appears without an error, or shows an error that a user can fix or work-around the problem.

Minimal reproducible OpenAPI snippet(if possible)

# oas.yml
openapi: "3.1.0"

info:
  title: "Redoc JSON pointer parsing bug"
  version: "0.0.1"

paths:
  /foo:
    get:
      responses:
        "200":
          content:
            application/json:
              schema:
                $ref: "./responses.yml#/StringResponse/application~1json/schema"

  /bar:
    get:
      responses:
        "200":
          content:
            application/json:
              schema:
                $ref: "./responses.yml#/NumberResponse/application~1json/schema"
                # Using this ref instead of the NumberResponse works
                #$ref: "./responses.yml#/StringResponse/application~1json/schema"
                # Using this (no slash in pointer tokens) ref instead of the NumberResponse works
                #$ref: "./responses.yml#/ObjectResponse/application-json/schema"

# responses.yml
StringResponse:
  application/json:
    schema:
      type: string

NumberResponse:
  application/json:
    schema:
      type: number

ObjectResponse:
  application-json:
    schema:
      type: object
      properties:
        foo:
          type: string

Screenshots
None.

Additional context
None.

Start with the minimal oas.yml and responses.yml reproduction, then trace Redoc's handling of external $ref values and JSON Pointer tokens containing ~1. Done means both StringResponse and NumberResponse render without an "Invalid reference token" error, while equivalent references without ~1 continue to work.