Non-existent value for a required field gives mixed results

[dschwentker]

For Medical Sign or Result, if I enter a non-existent value for these fields, the chart will not render and shows an error message: "There might've been some problems initializing the chart. Errors include:
TypeError: d[_this.config.measure_col] is undefined". There is a spinning wheel below the error message.

For Result, ID, Visit, Visit (Numeric), and Measures; if I enter an invalid value, the chart renders, but shows no data points. It also does not show any kind of error message. At no point do I see a "variable does not exist error", either in the developer tools Console output, or in the container element.