Attack Speed Discrepancies Between In-game and PoB

As I was min-maxing the attack speed on my cospri build I noticed discrepancy between the PoB attack rate and the in-game tooltip.

using https://pastebin.com/x9iiZG8W as build reference:

PoB says 6.44 attack rate, however in-game it says 6.45, slightly higher than PoB
If you add the 5% attack speed jewel Cataclysm Shrine into the empty socket PoB says 6.72 while in-game says 6.71, slightly lower this time
Finally if you turn on elusive for the 15% attack speed, PoB says 7.53, which is perfectly just under cospri's 7.57 breakpoints, however in-game it says 7.58, this time higher than PoB and also above the breakpoint.

Obviously it is 7.58 unless something is going horribly wrong with the in-game tooltip but bouncing back and forth between which one is higher is a bit puzzling.

Inizia riproducendo i tre confronti della velocità d’attacco del build Pastebin collegato: la configurazione Cospri di base, il Cataclysm Shrine jewel e il 15% attack speed di Elusive. Traccia il calcolo della velocità d’attacco utilizzato da PoB e confronta il suo arrotondamento o la gestione dei breakpoint con il tooltip del gioco; il lavoro è completato quando la discrepanza è spiegata e il valore visualizzato è corretto o confermato.