Invalid field value "watchCount"

[Vladimir]

I make an API request for a project

https://jira.localdomain.local/rest/api/2/search?jql=project%20%3D%20%22PROJECT%22%20order%20by%20id&fields=*all

 In one of the issues in the fields, I have value

1:
  fields:
     watches:
        self: "https://jira.localdomain.local/rest/api/2/issue/TRACK-2/watchers"
        watchCount: 0
        isWatching: false
        created: "2018-03-26T18:58:48.000+0300"

I follow the link "https://jira.localdomain.local/rest/api/2/issue/TRACK-2/watchers" and get the value

self:   "https://jira.localdomain.local/rest/api/2/issue/TRACK-2/watchers"
  isWatching:    false
  watchCount:    1

watchers:
  0:
    self: "https://jira.localdomain.local/rest/api/2/user?username=i.ivanov"
    name: "i.ivanov"
...

If I understand correctly and follow the example of other issues then on an API request I should receive field - "watchCount: 1"

How to fix this error?