ffmpeg scale question.It succeed when the size is 2048,but when 4096 failed

if:
ffmpeg -y -loop 1 -i ./rebirth/image4.png -loop 1 -t 1.4 -i temp.png -filter_complex “[0]scale=2048:2048[video0],[video0][1]xfade=transition=fade:duration=0.8:offset=0.1” -c:v libx264 -r 30 -pix_fmt yuv444p temp.mp4

it goes right.but when temp.png is bigger,it goes wrong,like:
ffmpeg -y -loop 1 -i ./rebirth/image4.png -loop 1 -t 1.4 -i temp.png -filter_complex “[0]scale=4096:4096[video0],[video0][1]xfade=transition=fade:duration=0.8:offset=0.1” -c:v libx264 -r 30 -pix_fmt yuv444p temp.mp4

I have enlarge the temp.png in the 2nd example.the size of image4.png is 1152×1152.