Features predefined value issue

[Marcel]

I have a lot of features for several products and pre defind the values.

After uploading a csv file with my products, on my productpage the features are showing  with the value as customized values.

The predefined values column is showing " choose a value" but is grey and I cannot select that. ( see screenshot)

When I select another feature in the first column and then back to the one it was, i can select the value from the predefined dropdown.

Is this normal or did I do something wrong?