action button not working

[dave-lawrence-dev]

jquery-confirm version: v3.3.4

I'm submitting a ... (check one with "x") [ x ] bug report [ ] feature request [ ] support request

Current behavior: Very occasionally the 'SET' button in our dialog box is unresponsive and the action() is not called. the 'CANCEL' button works

Expected behavior: SET should always work

Steps to reproduce: This is a bug report from a customer, we have been unable to reproduce the fault in the office.

Related code:

$.confirm({
  theme: 'black',
  title: null,
  content: `<span style="font-size: 150%">Set state for ${item} to ${state}</span>`,
  buttons: {
    cancel: {
      text: "Cancel"
    },
    set : {
      text: `Set to '${state}'`,
      action: function() {
        console.log("Setting ${state}");
      }
    }
  }
});

I've had to redact this code from the original, so please excuse any typos. Other information: This is very rare; I've not seen the problem first hand. I've replaced the actual code with a console.log() The 'mouseover' effect for the SET button appears, but clicking just does nothing. no code is called. dialog remains open.