Hi Tristan,
I’m not sure how your field would not have brackets in the Editor view but does in the WixDatabase app. From the Editor, are you sure you synced with “Copy all items to Live”? Also, in the Editor view can you click the 3-dot icon next to descriptionmod to confirm that the field has been added? If the pop-up menu has “Add field to schema”, then it is still temporary and needs to be added using the procedure I outlined above.
Could you send me the URL for your actual site (not the WixDatabase link)?