I'm plotting genomic ranges in circle layout using ggbio to connect items from different categories/chromosomes via the metadata column "cross", itself an GRanges column.

cp <- ggplot() + layout_circle(gr.cats, geom = "ideo", fill = "white", radius = 30, trackWidth = 4)
cp.link<- cp + layout_circle(gr.all[seqnames(gr.all) == "1_CH"], geom = "link", linked.to="cross", col=red, radius = 28, trackWidth = 1)

Unfortunately, I get a small number of identical warnings.

In FUN(X[[25L]], ...) : no non-missing arguments to max; returning -Inf

When I execute the plot cp.link, i get a plot identical to cp alone and the following message:

Warning message:
Removed 10527 rows containing missing values (geom_path).

This has worked previously and now I've spent a day already looking for the bug. Any guesses are welcome, thanks!

UPDATE: my dummy example reproduces this error as soon as I try to process each chr separately - why? Thank you:

gr.cats<-GRanges(seqnames=c("chr1", "chr2", "chr3"), IRanges(start=rep(1,3), width=rep(100,3)), strand=rep("*", 3))
seqlengths(gr.cats)<-rep(100,3)
gr.cats

GRanges with 3 ranges and 0 metadata columns:
      seqnames    ranges strand
         <Rle> <IRanges>  <Rle>
  [1]     chr1  [1, 100]      *
  [2]     chr2  [1, 100]      *
  [3]     chr3  [1, 100]      *
  ---
  seqlengths:
   chr1 chr2 chr3
    100  100  100

gr.all<-GRanges(seqnames=c(rep("chr1",100), rep("chr2",100), rep("chr3",100)), IRanges(start=rep(seq(1,100),3), width=rep(1,300)), strand=rep("*", 300))

seqlengths(gr.all)<-rep(100,3)

gr.cross<-GRanges(seqnames=c(rep("chr2",100), rep("chr3",100), rep("chr1",100)), IRanges(start=rep(seq(1,100),3), width=rep(1,300)), strand=rep("*", 300))

seqlengths(gr.cross)<-rep(100,3)

values(gr.all)$cross<-gr.cross

gr.all

GRanges with 300 ranges and 1 metadata column:
        seqnames     ranges strand   |             cross
           <Rle>  <IRanges>  <Rle>   |         <GRanges>
    [1]     chr1     [1, 1]      *   |     chr2:*:[1, 1]
    [2]     chr1     [2, 2]      *   |     chr2:*:[2, 2]
    [3]     chr1     [3, 3]      *   |     chr2:*:[3, 3]
    [4]     chr1     [4, 4]      *   |     chr2:*:[4, 4]
    [5]     chr1     [5, 5]      *   |     chr2:*:[5, 5]
    ...      ...        ...    ... ...               ...
  [296]     chr3 [ 96,  96]      *   | chr1:*:[ 96,  96]
  [297]     chr3 [ 97,  97]      *   | chr1:*:[ 97,  97]
  [298]     chr3 [ 98,  98]      *   | chr1:*:[ 98,  98]
  [299]     chr3 [ 99,  99]      *   | chr1:*:[ 99,  99]
  [300]     chr3 [100, 100]      *   | chr1:*:[100, 100]
  ---
  seqlengths:
   chr1 chr2 chr3
    100  100  100

Now, when I run the layout_circle command on all of gr.all it works, but when I subset for a specific chr, it fails:

cp.link <- cp + layout_circle(gr.all, geom = "link",  linked.to = "cross", col=rgb(1,0,0,0.05), radius = 28, trackWidth = 1)

layout_circle() is now a lower level component to transform a
           linear object, and please check circle() for easier API

cp.link.chr1 <- cp + layout_circle(gr.all[seqnames(gr.all) == "chr1"], geom = "link",  linked.to = "cross", col=rgb(1,0,0,0.05), radius = 28, trackWidth = 1)

layout_circle() is now a lower level component to transform a
           linear object, and please check circle() for easier API
Warning messages:
1: In FUN(X[[3L]], ...) : no non-missing arguments to max; returning -Inf
2: In FUN(X[[3L]], ...) : no non-missing arguments to max; returning -Inf

cp.link.chr1

Warning message:
Removed 2900 rows containing missing values (geom_path).