Warnings when using "circular" and "fan" layouts

[willgearty]

I'm getting the following warnings when using the "circular" and "fan" layouts:

library(ggplot2)
#> Warning: package 'ggplot2' was built under R version 4.5.2
library(ggtree)
#> ggtree v4.1.1 Learn more at https://yulab-smu.top/contribution-tree-data/
#> 
#> Please cite:
#> 
#> Shuangbin Xu, Lin Li, Xiao Luo, Meijun Chen, Wenli Tang, Li Zhan, Zehan
#> Dai, Tommy T. Lam, Yi Guan, Guangchuang Yu. Ggtree: A serialized data
#> object for visualization of a phylogenetic tree and annotation data.
#> iMeta 2022, 1(4):e56. doi:10.1002/imt2.56
library(ape)
#> 
#> Attaching package: 'ape'
#> The following object is masked from 'package:ggtree':
#> 
#>     rotate
tree <- rtree(100)
ggtree(tree, layout = "circular")
#> Warning: Unknown or uninitialised column: `subgroup`.
#> Warning: Unknown or uninitialised column: `subgroup`.
#> Unknown or uninitialised column: `subgroup`.
#> Unknown or uninitialised column: `subgroup`.

^{Created on 2025-11-19 with reprex v2.1.1}

It looks like this might be some interaction with coord_polar or coord_radial from ggplot2.