Invalid contig name for alternate contigs

[maxmilianr]

Hi,

our variant catalog contains OfftargetRegions on alternate contigs, e.g. "chr4_KI270790v1_alt:200469-201085"

ExpansionHunter works without issues and i get a valid vcf-file.

When starting REviewer with the exact same assembly reference and catalog, i get the error:

[error] Invalid contig name chr4_KI270790v1_alt

Removing all alt. contigs from the catalog results in the error:
[error] Failed to extract reads from the specified region

This is the catalog file: variant_catalog_gnomAD_with_offtargets.GRCh38_202306.json