[Observium] Unable to delete alert checkers

Cant delete an alert checker. When I click on Delete the confirmation prompt comes up and the checkbox is already selected but the delete alert is disabled. Unchecking the box enabled the button but clicking it doesn't delete the alert. We are on 21.3.11160 (24th March 2021)

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Did find in the HTML to enable the button when the checkbox is pressed was to remove the "disabled=1"

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