This is a known issue which occurs because the Bloomberg application hangs due to the latency introduced by Endpoint agent scanning.
Adding higher timeout variables has addressed latency issues with other applications such as iNotes ( KB 54445 ), Documentum ( KB 52411 ) and EDIM ( KB 54663 ).
However, in the specific case of printing via Bloomberg, the print actually consists out of a screenshot and not actual data and thus can not be scanned (unless OCR is implemented via FlexResponse). The recommended resolution is bypassing monitoring via Application Monitoring:
This will add an exception for the Print/Fax channel for the Bloomberg application.