Function/sub exiting early except when called from Developer tab

I have a sub that performs a variety of actions such as taking inputs from a worksheet and outputting to another as well as modifying a chart object. I want the sub to be "volatile" so that it evaluates whenever any changes are made to the workbook. I've tried to make it both a Function and a Sub that is called by a separate volatile function but the end result is the same. For some reason the sub appears to exit early unless I call it from the Developer tab and not when a change is made on a worksheet however I don't want to do that since I want the evaluation to be automatic.

I've attached a simplified version of the workbook and the "exiting early" issue can easily be seen if breaks are placed on the three lines that output to the "K" worksheet.

As a second issue, the breaks also show that the sub evaluation isn't straight through and is bouncing from one line to another for some reason.