moving object with keyboard directional arrows - error

hello, I use adobe animate for 1 week, I noticed a problem when I moved objects with the directional arrows. When I press a lot of arrows up and down in equivalent ways, the object moves slightly to the right. Same thing for the left / right arrows, the object moves slightly upwards. How to solve the problem?

I will give yet another example: when I press the left arrow on the keyboard, the object does not move only on the X axis but also on the Y axis, but why on the y axis?