I noticed XP orbs are behaving oddly in 2 ways:

1) the orbs spread across the ground in a line behind the player for up to approx 30 blocks after killing a large number of mobs in a farm - no issues collecting orbs from the line on the ground

2) a number of orbs were absorbed after using the farm but several hovered around the player's feet after walking away approx 40 blocks from mob farm and only were absorbed by the player when they returned to the farm (photo attached).