branch lengths are lost when rerooting a tree imported with read.iqtree()

[andreaniml]

While importing a tree made with iqtree that has the support values for alrt and ultrafast bootstrap at the nodes with the formating "Number1/Number2" using treeio:read.iqtree(), the data is imported correctly.

However, when rerooting using treeio::root(t, outgroup = "Reference tip", resolve.root = TRUE), the resulting tree loses the branch lengths, transforming into a cladogram.

t <- treeio::read.iqtree("iqtree_ufbandalrt.treefile") #unrooted tree

ggtree(t) #this one has a data section with ufb and alrt

tree_rooted <- treeio::root(t, outgroup = "Outgroup_tip_label", resolve.root = TRUE) #branch-lengths are gone

ggtree(tree_rooted) # cladogram

Removing "resolve root" does not alter the branch length loss.