Unless you open a form/report/query in design and alter it, there is nothing to save. Access automatically handles new or edited data in bound forms and editable queries in a few ways, none of which require you to click Save. I'm seeing the mentioned brackets [Forms]![Reference Drawing Search]![Jnametxt] and if this works sometimes and not others, it can't be a mis-spelled control name IMO. I wonder if you have name auto correct enabled in db options and at some point you changed the name of your control or form. The old name might be raising its ugly head behind the scenes. Suggest you compact/repair db and see what happens. The general consensus seems to be to turn off name auto correct.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.