Link not working from section i.d

Hello all.

I am having a constant issue with linking my nav link to the section (hope that makes sense, new to webflow/design lol)

I go to my Section and insert the I.D (service__card) and tag (Section)
I then go to my nav link to link them. The text is services, the type is Section , the section with the drop down I chose service__card, then save.

I then go and prieview and it takes me to the relevant section, however when i try this again and go back to the nav link settings the drop down is empty prompting me to choose service__card again.

I don’t have a paid service yet as just learning on the free plan. Any help will be appreciated.

Thank you

Pete