Crash when merging HDR

Bridge 13.0.3.693 crashes when merging multiple files to HDR. This always happens after successfully merging several DNGs (maybe 10-20). The first DNGs merge just fine, but then Bridge freezes and crashes when I merge another set of brackets. After restarting Bridge I can continue merging several bracketsm but the crash always happens again after a while. The crash depends neither on the number of images in the brackets, nor on the merging settings. I have been experiencing this problem for half a year at least.