Great Balls are always curveballing

For some reason in my game, great balls keep flying off to the right even when I throw them straight. I do not have this problem when using regular pokéballs.

How do I stop great balls from doing this? Or do I just have to throw all of them as a curve ball to work around the problem?

EDIT: This problem seems to have been fixed as of yesterday's update.

Solution 1:

This problem seems to happen a lot lately. I have seen it myself an hour ago. Everything I threw right on target turned into a curve ball and went wide. And when I tried to take that curve into account the ball went straight forward and missed as well. Just like you described.

My tip: Yes, always go for a curve ball until it gets fixed. This worked for me.