Gauss scoring, missing value "1" is higher then real value

Elastic Stack Elasticsearch
1

I'm using Gauss scoring, but it returns 1 if a field is missing.

The missing field ends up being scored higher then the real fields. The real fields results are between 0 and 1.

I'd like to be able to set "missing: 0.01".

This doesn't make sense to me.

{
               "gauss": {
                  "last_updated": {
                     "origin": "now",
                     "scale": "90d",
                     "decay": 0.9
                  }
               },
               "weight": 10
},
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