Veraero and Verthunder change to Verholy and Verflare even when actions aren't learne

[Caliburn]

Date & Time: 18:20~GMT 11 July 2019
Frequency: Consistent
World name: Zodiark
Character name: Caliburn Lucent
Retainer name: n/a
NPC name: n/a
Monster name: n/
Class/Level: RDM 72 synced down to 60 and 50
Party or solo: Party
In-game time: 10pm~
Area and coordinates: All instanced dungeons/raids
Housing: n/a
Steps:
1. Use full RDM melee combo (only tried with Enchanted versions)
2. Verstone and Verthunder action icons change to disabled Verholy and Verflare icons
3. Use an action which triggers the GCD to change icons back to Verstone and Verthunder (off-GCD actions won't revert the icons back to normal)
*Add more steps if necessary

This is on PC.

[I don't believe the rest of the requested info about PC specs and internet connection is required but let me know if so.]