Hello,
In the latest version of Power Automate, Power Fx is enables. Hence %CurrentItem[ColumnName]% expression is not giving the expected output.
Instead, you can use functions to retrieve the value of a column. Here is the syntax "=ReadCell(CurrentItem, ColumnIndex)". The column indexes start from 1, 2, 3, 4 etc.
For example, to get the value of first column in the currentItem inside a for each loop : =ReadCell(CurrentItem, 1)


Hope this resolve your issue!