Tag or album selection doesn't work for face detection and recognition in Digikam 5.4

[Julien Cubizolles]

If I try to limit the scope of face recognition or face detection either
to a single album or to a single tag ("Unknown" for instance), I get the
message "process finished in 0.000 s" (translated from french) and it
doesn't do anything. If however as choose to scan the "whole
collection", it takes some time and seem to actually do something.

Is it a known bug in this version ?

Julien.