Colons in contig names appear to cause rendering error

[geoffjentry]

We're using Quilt with IGV. It appears to be using version 2.5.11.

We noticed a set of our processed samples was failing to load the reference FASTA with the following error:

I looked into this saw that the fasta had a single contig named chr:1155232524-155232525. I was able to deterministically toggle the error by removing/re-adding the : in the contig name.

Examples that worked:

1. chr
2. chr1155232524-155232525
3. chr1 AC:CM000663.2 gi:568336023 LN:248956422 rl:Chromosome M5:6aef897c3d6ff0c78aff06ac189178dd AS:GRCh38
4. foo

Examples that failed:

1. chr:1155232524-155232525
2. chr:1-1000
3. chr1:1-1000 AC:CM000663.2 gi:568336023 LN:248956422 rl:Chromosome M5:6aef897c3d6ff0c78aff06ac189178dd AS:GRCh38
4. foo:something

Is this a known and/or expected issue?