Facet map with just one panel does not include panel title

[Nowosad]

@mtennekes -- see the example below. My assumption is that the panel title would always be shown when the tm_facets() is applied (consistency).

library(tmap)

tm_shape(World) +
  tm_polygons() +
  tm_facets("continent")

# facet map with one panel does not include panel title
europe = subset(World, continent == "Europe")
tm_shape(europe) +
  tm_polygons()  +
  tm_facets("continent")

^{Created on 2025-12-01 with reprex v2.1.1}

[mtennekes]

Thx @Nowosad now panels are shown if facets are defined. So it should be consistent now. We'll have to see if there are use cases which are not consistent anymore. Closing this for now.

[Nowosad]

Thanks! I think this is an improvement (more stable/consistent), but I am also sure that some people may be surprised (as it works differently than in the past). We will see..