Uptime monitor format settings

This is maybe a new issue because I didn't notice it in previous versions. The uptime format is set by default to (see example below)

%d d %h h %m m

With no possibility of custom format like for clock.

Is it possible to set up manually from a config file, or to revert it back ?

Xfce version 4.16

xfce4-systemload-plugin version 1.3.1

Old time format (which is OK, in the new version it will be displayed 1h 11m):

Xfce version 4.16pre

xfce4-systemload-plugin version 1.2.3