Disable Typewatch binding when Enter key is pressed

I am using Typewatch jQuery plugin in one of the applications and I have the following code for submitting the form and calling an Ajax request.’

searchForm.on('submit', function(event) {
    if (event) {
        event.preventDefault();
    }
    if (search.data.searchRequest) {
        search.data.searchRequest.abort();
    }
    searchForm.addClass('is-loading');
    search.data['searchStart'] = 0;
    $('#js-postslist--searchpanel').empty();
    $('.js-searchpanel-results').removeClass('is-visible');
    var filterQuery = csUtils.methods.getFilterQuery(true, search.data.terms);
    search.data.searchRequest = search.methods.ajaxCloudSearch(filterQuery);
});

searchField.typeWatch({
    callback: function() {
        return searchForm.submit();
    },
    wait: 500,
    highlight: false
});

Here the issue is, when I press Enter(return) key, the form is getting submitted twice. It is going to the submit function two times as the form has default submit behavior on pressing the Enter key. I can’t remove this as users will press the key once they enter the search term. I need to disable the Typewatch binding when Enter key is pressed so it will not submit the form two times.

How can I do this ?