ggpoker cashier asked for source of funds after i withdrew less than lifetime deposits

Did a withdrawal for about half my lifetime deposits and got hit with a source of funds request, which threw me off. Always been steady, mostly blackjack and some sports parlays, nothing wild. Never had a withdrawal flagged before, usually the cashier stuff is smooth for me with other places. Sent what they wanted, just bank screenshots and a payslip, but it feels weird when you’re withdrawing less than what you’ve put in overall.

Trying to keep my game steady and low-key, don’t love extra eyes on what’s already my own money. Anyone else see this pop up even if you’re not really “up” overall? Wondering if I triggered something or if this is just standard now everywhere. Sort of makes me think twice about bumping up my bets, even for those sweet streaks on live blackjack.