Why do I see null in a URL field?

I am editing a sandbox database with the inbuilt spreadsheet editor
I have a field that is of type URL and for one item this displays null whereas all the other empty items displays a blank for that field where I have not entered anything
Try as hard as I can I don’t seem to be able to remove the cause of the message
Also on my iMac I cannot right-click so I do a Control-Click on the item number and it does not give me options to Duplicate or Delete the item
This is a bit frustrating

Cheers
Dave

Hello Dave,

Can you post the code where you are checking the URL field to see if there might be a problem with that?

Thanks,
Majd