Stablecoin liquidity and yield aggregator withdrawal reliability

Been diving deeper into stablecoin yield aggregators for some consistent low-vol returns. Encountered a few situations where larger withdrawals from certain platforms became incredibly slow, almost a liquidity crunch scenario. Not talking about flash loans or anything exotic, just decent sized USD stablecoin off-ramps. Are others seeing this more frequently, especially during market volatility, or is it isolated to specific protocols? Trying to gauge if it's a general DeFi infrastructure issue or just poor underlying liquidity management from a few bad apples.