The issue is reproducible in betalabs too.

Steps to Reproduce:

1. On Homepage Suggested Edits module click on the arrow to navigate to the next article (doesn't matter what filters are selected), so the counter will show something like '2 of 200 suggestions'.
2. Click on the topic filters (it's ok if it shows 'Select interests') - in the open overlay do not select any filters but click to cancel (on the 'X').
3. The previously fully displayed article card starts displaying the skeleton which never finishing loading.
4. Click on the navigation arrow to go to the previous article - the following error will be displayed:

Uncaught TypeError: Cannot read property 'tasktype' of undefined

SuggestedEditsModule.prototype.updateTaskExplanationWidget = function() {
                    var explanationSelector = '.suggested-edits-task-explanation'
                      , $explanationElement = $(explanationSelector);
                    if (this.queuePosition < this.taskQueue.length) {
                        $explanationElement.html(new TaskExplanationWidget({
                            taskType: this.taskQueue[this.queuePosition].tasktype,
                            mode: this.mode
                        },this.logger).$element);
                        $explanationElement.toggle(true);
                    } else {
                        $explanationElement.toggle(false);
                    }
                }
                ;

The counter will show '0 of 200 suggestions'

The animated gif shows never ending card info loading (the skeleton) after canceling filter overlay