Search syntax for label does not work as expected

Issue Summary

Search syntax for label does not work as expected.
labelText:labelname
per :
https://support.atlassian.com/confluence-cloud/docs/confluence-search-syntax/
https://support.atlassian.com/confluence-cloud/docs/use-labels-to-organize-your-content/

Steps to Reproduce

1. add a TEST label to any page
2. use syntax in the search bar to look for this label text: bug or budtest
3. It will display pages where the content bug or bugtest is used instead of the page where the label is added

Expected Results

It should display the page where the label is added.

Actual Results

It will display pages where the content TEST is used instead of the page where the label is added
Note: Upon on using an advance search with label filter selected works fine.

Workaround

Use the label filter in advance search instead of using the label search syntax