Form not updating to opo-opo form before next GCD when using Demolish

[echo78]

Time: Around 5:30am central time on 11/24/16
ISP: AT&T
Type of Internet Connection: DSL
Internet Connection Speed: 13 Mb/s
Frequency: Always
World name: Exodus
Character name: Echo Skyla
Monster name: Striking Dummy
Class/Level: Monk level 60
Party or solo: Party
In-game time: N/A
Steps:
1. Have around 1315 skill speed on monk
2. Have greased lightning 3 make the global cooldown be 1.81 seconds.
3. Have a party member be an astrologian
4. Have the astrologian use an enhanced arrow card on the monk to make the global cooldown be 1.53 seconds.
5. When using demolish, the form stays in coeurl form for the next global cooldown instead of switching to opo-opo form.

Its possible to use demolish > snap punch because the form is not updating before the next global cooldown. If you use demolish > dragon kick or bootshine the opo-opo bonus will not be applied to dragon kick/bootshine.

This can also be done at 1.62 seconds global cooldown using a normal arrow (not enhanced). However, the form will sometimes update to opo-opo form before the next global cooldown at a 1.62 seconds global cooldown. The form will usually still be coeurl form at 1.62s GCD though.