Glitch involving the "Clearout" attack in Castrum Praetorium

Time: ~2 weeks ago (I cannot remember more exactly, I apologize)
Frequency: Once (have not attempted to replicate)
World Name: Malboro
Character Name: Brine Gildchaff
NPC Name: none
Monster Name: Proto-Ultima Arm Unit
Class/Level: Scholar lv. 50
Party or Solo: Full Party
In-game Time: unable to remember
Area and Coordinates: Castrum Praetorium, Research Level
Steps:
1. Entered Praetorium via Duty Roulette (Main Scenario)
2. Dungeon proceeded as normally until the segment where players ride the magitek armor Maggie.
3. During this segment I walked too far forward and came in range of the Ultima Arm Unit's attack "Clearout", which under normal circumstances deals damage, knocks the player back, and removes them from their magitek armor.
4. I realized I was too far forward and started trying to walk back out of range, but was struck by Clearout. However, despite receiving damage and knockback (the damage number displayed "Clearout" above it) I was not removed from my magitek armor and was able to continue using it normally.
5. The remainder of the dungeon proceeded without issue.

Connection Specs:
-Comcast broadband/DSL
-Modem DCP2100 series, maker Scientific Atlanta, inc.

PS3 Model Number: CECHA-01
No peripherals besides Sony brand controllers used (Sixaxis or Dualshock 3).