Seat Leon engine cuts out at roundabouts – any ideas before I lose my mind?

Got a 2016 Seat Leon 1.4 TSI and I've got this intermittent problem that's genuinely dangerous. Every now and then, when I slow down for a roundabout or a stop sign, the engine just dies. No warning, no stutter, just cuts out. It starts right back up immediately but it's happening maybe once or twice a week now. No check engine light. I've taken it to two different general garages and neither could find anything wrong. One suggested it might be the crank sensor but didn't want to replace it without being sure. I found the Top-Tier Seat Repair in 800Sayara Dubai and I'm hoping they have more experience with VAG cars. Has anyone had a similar stalling issue on a Leon or Golf? Could it be the fuel pump relay? Or maybe a vacuum leak? The car has 100,000km on it. I've already cleaned the throttle body and replaced the spark plugs. Any advice on what to check next would be amazing. Also any recommendations for a specialist who can diagnose intermittent stalling without just guessing? I'm near Al Quoz so anywhere in Dubai is fine. Really need to fix this because it's scary when it happens in traffic. Thanks.