Help Woocommerce variable prices range problem

I am doing a shop online in Woocommerce, and meet the following problem in the variable products, am illustrating you with photos in order that it is understood well.

Variable Product The whole OK without any model selects / variation of the product:

Variable Product when model selects one of the variations / appears the price below of the model (1.210 €) and what I look is that there is replaced the top price (1.210-1.330 €) for that of the model selected (1.210 €) and the price under the model selector / variation disappears:

does Someone know of some code or plugin? Thanks