product variation update

Hello,
I don’t know what is going on but each time there is product sync, the cost price from aliexpress changes upward.Example. If I import a product https://www.aliexpress.com/item/1005004771985744.html sold at $7.47 – $12.47 at aliexpress. Then there was a product sunc which i set daily, that cost price increased from $7.47 to $12.47 – $17.25

Then if you check the price at aliexpress, it is still $7.47

What is happening? I need a quick fix.