If you have some variables with the same name but some use an underscore, you cannot refer to the variable that does not use an underscore, for example, if you have these variables:
The automatic reference works with the first two variables but will not work with "nametest".
To solve it you will have to add a hyphen to "nametest":
Another option is to eliminate the low hyphens of the other variables to do so:
In this gif (gif with scroll bar) you can see how the reference does not work with "nametest"