API callout from aura component using Jquery

Question

We have a API callout from aura component which gets invoked on a button press. Our org has about 150+ users using it. Nowadays , few users are complaining of API not getting called from aura components intermittently.[Checked from the server side , it does not get request] Is this some scaling issue or there is a limit on API callouts from Aura components. Code used for calling api -

callApi : function(component,helper,jForm){
        let resource = component.get("v.resourceInfo");
        var urlEndpoint = resourceInfo['url'];
        $.ajax({
            url: urlEndpoint,
            data: jForm,
            isProcessData: false,
            isContentType: false,
            mimeType: "multipart/form-data",
            type: 'POST',
            headers:{
                "Authorization" : "Basic " + resource['api_key']
            },
            error: function(error) {
                component.set("v.error",error['statusText']);
                component.set("v.showSpinner",false);
            },
            success: function(data) {

                var obj = JSON.parse(data);
              if(resourceInfo['user'] == undefined ){
                    let stringJson = JSON.stringify(obj['msg']['file']) ;
                    if(stringJson){
                        attachmentURL = '[' + stringJson + ']';
                    }
                } else {
                    let stringJson = JSON.stringify(obj['attachment']) ;
                    if(stringJson){
                        attachmentURL = '[' + stringJson + ']';
                    }
                }
                
            }
        });
    }

P.S. - code does not work in one of the production org but works everywhere else.