In enwiki beta cluster there are several GrowthExperiments related controls that are displayed as MediaWiki labels:
⧼growthexperiments-addlink-onboarding-content-about-suggested-links-body⧽
⧼growthexperiments-addlink-ve-machine-suggestions-mode-submit-button⧽
⧼growthexperiments-help-panel-button-subsubheader-ask-help-mentor⧽
Also, there are labels that are not GrowthExperiments related:
⧼publishchanges-start⧽
Note: There was another similar issue: T282800