Question on Prop Firm Payout Reliability for Crypto Futures

Been trading crypto futures for a while, mostly on my own accounts with decent success. Recently passed a couple of challenges with different prop firms, which felt good. Now I'm getting into the payout phase, and frankly, I'm a bit on edge. One firm has a slightly slower payout cycle than I expected, and the other just added an extra verification step that's dragging things out.

My question for those with more prop firm experience, especially in the crypto space: how do you vet these firms beyond the initial challenge structure? I'm not talking about spreads or commission – those are transparent enough. I'm specifically focused on the backend infrastructure: their actual ability to process payouts efficiently and reliably. Are there red flags I should be looking for after passing the challenge but before a significant payout? Any particular questions I should be asking their support team regarding payout delays or additional KYB requirements once you're already trading their capital? My worry is getting stuck in a loop of delays or needing to jump through hoops after demonstrating profitability. It just feels different than withdrawing from a regular exchange.