Are you there 100% of the time? If you're at #1 organic and is not a featured snippet (which greatly reduced ctr) I'd probably run it through Cora's volatility tool to see how often I'm showing up on that position.
You are not really on position one. Position one is a featured snippet that gives people the answer they want. There are zero searches for that query. You are ranking for a popular brand name and people want the actual brand website.
If you're getting the data from Sesrch console it could be that it's your Google Business Profile ranking in position one but getting no clicks. You should also look at how many impressions the keyword has.
If you're seeing your self as a featured snippet for this query add nosnippet meta data to your page and you should see traffic rise, else wise this keyword might just have little to no search volume.