got the same problem with Airtable. I asked the Ahref support for help. They said it's nothing to worrie about while fetching data as we do. U can ignore the error in ahrefs and disable it being displayed π
I also hide these in Ahrefs (so it doesnt mess with my score). No problem at all. The ahrefs check is looking for issues where you do like example.com/pages//hello but our double slash is in a query parameter so all good