A lot of TypeError: Cannot read property 'lookup' of undefined

My error log is reporting 50+ errors/hr, however I do not notice any errors on the front end (yet)

It’s mostly warnings like this.

TypeError: Cannot read property 'lookup' of undefined
    at n (https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:371830)
    at t.invoke (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:487826)
    at e.t.flush (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:486840)
    at e.t.flush (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:488839)
    at e.t._end (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494214)
    at e.t.end (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:490785)
    at e.t._run (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494732)
    at e.t._join (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494517)
    at e.t.join (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:491493)
    at c (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:358691)

Another warning that occurs often is:

n@https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:371825
d</t.invoke@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:487826
d</t.flush@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:486840
m</t.flush@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:488839
t</t._end@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494214
t</t.end@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:490785
t</t._run@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494732
t</t.run@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:491393
u@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:358611
s/r.success@https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:204857
i@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:28213
fireWith@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:28981
w@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:79516
o/<@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:81961

Does this ring a bell to anyone? Is this a concern?