Recently I have opened an issue on IGV repository: igvteam/igv.js#1805 about a problem loading cram files. Initially, the problem was on the IGV tool side because there was a harded-coded limit related to the fetch size limit. They removed the limit, but now the cram file does not load. IGV developers recommended openning an issue here to report the problem. It seems that cram-js cannot load deep coverage cram files. I can send you the files I am trying to load, if necessary.
Recently I have opened an issue on IGV repository: igvteam/igv.js#1805 about a problem loading cram files. Initially, the problem was on the IGV tool side because there was a harded-coded limit related to the fetch size limit. They removed the limit, but now the cram file does not load. IGV developers recommended openning an issue here to report the problem. It seems that cram-js cannot load deep coverage cram files. I can send you the files I am trying to load, if necessary.