Inability to pull Extension Name in EPM

Yealink V83 firmware supports the variable account.x.label.  This variable displays a "label" on the phone that is intended to be the extension name, not the extension number.

EPM, seemingly correct, identified the basefile config id of "account.1.label" to be mapped to "_line1Name_".  This should then place "John Smith" in the upper left corner of the display.  It, however, displays the extension and not the extension name.  We confirmed by "hard setting" a name, that the name then does appear - showing us that the Yealink firmware does indeed work as it is designed.

Can EPM please by updated to have "_line1Name_" actually pull the name instead of the extension number?