This code:
```
transcriptID <- "ENST00000395443"

mart <- biomaRt::useMart(
  biomart = "ENSEMBL_MART_ENSEMBL",
  dataset = "hsapiens_gene_ensembl",
  host = "dec2013.archive.ensembl.org")

# Create transcript track
biomartTrack <- Gviz::BiomartGeneRegionTrack(
  filters = list(
    ensembl_transcript_id = transcriptID),
  biomart = mart)

# Create axis track
axisTrack <- Gviz::GenomeAxisTrack()
displayPars(axisTrack) <- list(
  add53 = TRUE,
  labelPos = "below",
  cex = 1.5
)

Gviz::plotTracks(
  c(biomartTrack, axisTrack),
  chromosome = "chr3",
  add53 = TRUE,
  add35 = TRUE)
```

Produces this:
Both strands are tagged with 5' on the left and 3' on the right, which is wrong. Is this a bug?

Thank you.