InfluxDB - groupSeparator is only applied to one summaryType

Sitespeed.io 8.6.5

"influxdb": { ... "groupSeparator": ".",

When this config option is set, only the Summary type is formatted correctly, as I query the data in InfluxDB.

time                browser category connectivity group                       max  mdev mean median min  origin      p10  p90  p99  page            pageTimings  statistics summaryType timings
----                ------- -------- ------------ -----                       ---  ---- ---- ------ ---  ------      ---  ---  ---  ----            -----------  ---------- ----------- -------
1551820685272654000 chrome  default  native       performance2_rc_nextiva_xyz 1733 0    1733 1733   1733 browsertime 1733 1733 1733 Launch_Platform pageLoadTime timings    pageSummary 
1551820685348698000 chrome  default  native       performance2_rc_nextiva_xyz 6193 0    6193 6193   6193 browsertime 6193 6193 6193 Login           pageLoadTime timings    pageSummary 
1551820685399924000 chrome  default  native       performance2_rc_nextiva_xyz 2918 0    2918 2918   2918 browsertime 2918 2918 2918 Open_CRM        pageLoadTime timings    pageSummary 
1551820685449569000 chrome  default  native       performance2.rc.nextiva.xyz 6193      3615 2918   1733 browsertime      6193                                              summary     pageTimings

Reproduce the InfluxDB output using the shown groupSeparator configuration and compare the formatting for pageSummary and summary records. Trace the InfluxDB integration entry point responsible for writing these summary types; done means the separator is applied consistently across both summary types.