Grey Talon Spirit Owl Stacks not properly displayed in damage numbers in abilities

[iskrauno]

Normal spirit purchased from shop/jars displays correctly in the damage on all spells, but spirit power gained from spirit owl killing people and from casting buff does not display on the spell damage - it is however calculated correctly as far as I can tell.

 

[iskrauno]

After further investigation - casting buff does not display on any hero - no damage numbers are adjusted in the displayed numbers, but the calculations are done correctly. Bug is a bit bigger than Grey Talon. Not sure if this only occurs in the practice range or not yet.