How do BTC withdrawals from cash app work exactly?

I have an issue where I accidentally copied the BTC address from the transaction of my BTC withdrawal from cash app to my external BTC wallet. I unknowingly copied that address and sent the BTC I just received from my BTC cash app withdrawal, back to the same address.

Cash app BTC "specialists" are trying to claim that the address I sent the BTC to, does not belong to cash app.

From my understanding BTC withdrawals from cash app work like this.

A customer requests a BTC withdrawal on cash app.

Cash app sends the BTC to a BTC hot wallet owned by cash app used to facilitate customer withdrawals.

Then the BTC is transferred to the BTC wallet address requested by the customer.

But am I missing something?

I'm confused by all the different input and output addresses on the transaction.

On the transaction id on mempool there's over a hundred different inputs totalling over 1.5 BTC.

I'm assuming cash app uses these hot wallets to send multiple customers withdrawals at the same time to cut cost of fees?

But there's no way that I would receive the BTC withdrawal from cash app from some random address unrelated to cash app right?

Here's all the details.

THE DETAILS

~ Cash app withdrawal:

https://mempool.space/tx/891c1f1b2726ebed89b96e049f5f805c92375b436b1bb47edef1d4f237dca196

~ My external BTC wallet address:

1EjKpi9gM8r5coii834u9HJuYi6FVLMym

~ Accidental send back to cash app:

https://mempool.space/tx/fb5113377c46e8be7a44a43cab8c5757605f9fb7933f4159ff8fa5d8b3e09e27

~ Cash app hot wallet I sent to:

bc1q8cfvewthndj7lapq6jku76x9zkzwhet3x98lmx

Thanks