Bramble Valley Softlock Completion

Was open a Baran Citadel - Bramble Valley, reach the triple boss arena and on the last one knockbacked him out of map, so, he get stuck and can't get hurt.
Has a good amount of knockbak and attack speed on my build, so, almost sure was the case.

Bug reference number: 2.340.037.000

Video showing it bugged: https://youtu.be/jbqKQW-0qGI