SwiftUI & Combine - AnyPublisher subscription at onReceive gets cancelled frequently

Environment

• OS: macOS Monterey 12.0.1
• Xcode: 13.1

Context & Issue

I'm implementing a feature which calls an API to fetch new data as an observed value changes. In order to avoid too many API calls, I tried throttling the observed value publisher. But I found this throttling doesn't work if I apply the .eraseToAnyPublisher() method to the publisher. After some investigation by myself, I noticed the .eraseToAnyPublisher() causes many unnecessary subscriptions and unsubscriptions to the throttled publisher. So I'm wondering if I make any mistakes and would like to get helps.

Minimal reproducible example

import SwiftUI

@main
struct SwiftUITestApp: App {
  var body: some Scene {
    WindowGroup {
      ContentView()
    }
  }
}

class ViewModel: ObservableObject {
  @Published var value: Float = 0
}

struct ContentView: View {
  @StateObject private var viewModel = ViewModel()
  @State private var text = ""
  
  var body: some View {
    VStack {
      Text(text)
      Slider(value: $viewModel.value, in: 0...1)
    }
    .padding()
    .onReceive(
      viewModel
        .$value
//        .eraseToAnyPublisher() // Uncomment this line causes the issue
        .throttle(for: 1, scheduler: DispatchQueue.main, latest: true)
        .print()
    ) { value in
      text = String(format: "%.2f", arguments: [value])
    }
  }
}

Behavior without .eraseToAnyPublisher()

If I don't apply .eraseToAnyPublisher(), this code works as expected and the .print() of the publisher will output something like:

receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.0)
receive cancel
receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.0)
receive value: (0.021933686)
receive value: (0.28136003)
receive value: (0.6122359)
receive value: (0.66554797)
receive value: (0.3587148)
receive value: (0.2890992)

Behavior with .eraseToAnyPublisher()

If I apply .eraseToAnyPublisher(), the throttled publisher gets subscribed and unsubscribed many times. This makes the throttling look not working. The .print() of the publisher will output something like:

receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.0)
receive cancel
receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.0)
receive cancel
receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.12430311)
receive cancel
receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.12430311)
receive cancel
receive subscription: (Throttle)
request unlimited
request unlimited
receive value: (0.13761736)
receive cancel
receive subscription: (Throttle)

Question

Though I've already found a workaround (= not using .eraseToAnyPublisher()), I would like to understand why this happens. In my understanding, .eraseToAnyPublisher() only erases the type information and should not cause any behavioral changes.

Thanks