Prop Firm Infrastructure Issues: Payouts and Liquidity Flow

I'm looking for a new prop firm and see many offering attractive conditions. What really concerns me is the reliability of payouts and liquidity management. When there's big news or extreme market volatility, the spreads of some brokers these prop firms use widen so much that trading becomes almost impossible. Has anyone experienced issues with the liquidity of brokers chosen by prop firms? Or are there better ways to assess the risk of prop firm payouts than just reading reviews on forums? I'd like to know if anyone has ever had problems with clawbacks or unusually long payout delays. I'd appreciate insights from those who have faced these situations.