Hello, I would like to plot SNP coordinates (from a VCF file) along chromosomes using the ggbio package. But I can't succeed in adding the main title:

library(VariantAnnotation)
library(ggbio)
fl <- system.file("extdata", "ex2.vcf", package="VariantAnnotation")
vcf <- readVcf(fl, "hg19")
autoplot(rowRanges(vcf), layout="karyogram", main="Test")

However, the resulting plot doesn't have any title. What did I do wrong?

ps: I am using Bioconductor version 3.3 and R version 3.3.1

Should be fixed in 1.21.7.