New Tag values not showing in "SHOW TAG VALUES"

I have influxDB machine of 8GB, which consumes of 4 to 5 GB for influxdb of version 1.4.2.
I have existing db, measurement, and
I have added new tag values for an existing tag keys.

But, after adding the records,
**SHOW TAG VALUES from measurement with KEY=tagkey**,
**now showing all the tag values**, It only shows the **older tag values**.

Start by reproducing the report against an existing database and measurement after adding records with new values for an existing tag key. Run the described SHOW TAG VALUES FROM measurement with KEY=tagkey query and verify whether both older and newly added tag values are returned.

Written by the indexing model from the issue text.