The `size` argument of `element_rect()` is deprecated as of ggplot2 3.4.0.

[peterjc]

Running the A. thaliana F1 hybrid example analysis from the README gives a warning:

Warning message:
The `size` argument of `element_rect()` is deprecated as of ggplot2 3.4.0.
ℹ Please use the `linewidth` argument instead.

You have this in three places based on a GitHub search:

• plot/plot_blob.R
• plot/plot_spectra_cn.R
• plot/plot_block_N.R

The deprecation was four years ago, old name still works as of ggplot2 v4.0.3 but for how much longer?