Plus if the engines do not respond at the same rate, you have asymmetric thrust leading to a yaw if not corrected - and I assume the rudders are not particularl

Plus if the engines do not respond at the same rate, you have asymmetric thrust leading to a yaw if not corrected - and I assume the rudders are not particularly effective at low speed, especially if the engine nacelles, at high angle of attack, are partially blanking them with turbulence. Stall + yaw = spin as a general rule.