Pulling elevator increases the angle of attack of the wing and brings the wing closer to tip stall if it has that characteristic. This can/should be tested for by getting very high, reducing power to 1/3 and pulling a tight loop with lots of elevator. If the plane rolls out of the loop, a tip has stalled.

If your plane indicates this behavior then caution must be used on the amount of elevator used at slower speeds. There might be some things you can do to help. First, if possible reduce your up elevator throw to simple keep from slamming in too much angle of attack. Second, if the plane has barn door ailerons with individual servos, place each on a separate channel and follow your radio instructions for programming, after which set a throttle to aileron mix so that when your throttle comes back half power, the ailerons start trimming up. At low throttle they might have 3/16 up trim. This will simulate wash out in the wing, which is an anti tip stall device and only come into play at less than half throttle so will not affect power on aerobatics.... just don't do any inverted at less than half throttle.

Last... if your plane has determined tip stall character... it must be respected. For me, the most danger is the turn from base leg to final with a cross wind blowing on the tail. Some people call it coffin corner. If a strong wind is in your face... be very cautious about slowing down on the base leg as when the turn to final is made... bad things can happen. If facing a strong wind in the face... always ask yourself, is this a tip stalling plane? If yes, then make the down wind leg twice as high as usual and give the base leg a gentler but steeper turn.