So in the current patch notes it says the following:
"
- Holy Ground is no longer cast independently of the overall cooldown. The ability basic damage has been increased by 38%. Casting it now costs 2 Canons of Light and 2 Canons of Purity. The cooldown duration is now 40 seconds for all levels.
"
Currently in game without 500 Swiftness and r3 and no rubies we have a 1m 24.6s (have a total of 60 swiftness from rubies and 20 stat buff
In the screen shot you can also see it takes 3 cannons of each not 2.
now with over 500 Swiftness and Light Crown Rubies we have 36.9s
in multiple russian videos i see paladins from this patch have 16s CD on holy ground with 500 swiftness and with 410/415 20s cd ours doesn't change this is a bug and on top of that the 3 cannons each is wrong. Please fix this issue. I will send a ticket as well!