It was mentioned already. If devs didn’t change anything this post is still valid:
One thing that is worth mentioning that soldier then didn’t get xp for damage done with bleeding, poison or acid on the enemy. That would be shame if it wasn’t changed, but it was like that in Backers Builds. Answering question
Whole team won’t get more xp, but soldier who killed that bleeding enemy will draw xp from other soldiers (will receive more).