Weird Graph if they have same tag value

If I have data that contains `tagA=someValue1,tagB=someValue2` and `tagA=someValue2,tagB=someValue1`, the quried `Raw Data` has

| table | _field | _value | tagA | tagB |
|------|-------|----------|------|----|
|0 | field_name | field_val1 | someValue1 | someValue2|
|0 | field_name | field_val2 | someValue1 | someValue2|
|0 | field_name | field_val3 | someValue1 | someValue2|
|1 | field_name | field_val1 | someValue2 | someValue1|
|1 | field_name | field_val2 | someValue2 | someValue1|
|1 | field_name | field_val3 | someValue2 | someValue1|

but when it goes to graph, there is juse one line, just like

No source file, test, or entry point is identified. Reproduce the reported Raw Data and graph combination with the two tag pairs, then trace how the rows become graph series. Done means both distinct tag combinations render as separate lines rather than one combined line.

Written by the indexing model from the issue text.