Terrax vs Omega Sentimel

Opx

I had a Terrax vs Omega Sentinel match in BG today. I started with rock field. I only gave 5 hits and the OS already had 2 bars charged. After the time when I used Sp2 and attacked the OS, it only had less than 1 bar. But after 5 hits she immediately had sp3 charged. The match lost. Did I not notice something in her description that causes this?

PacoP3k

In the current meta the opponent gains power when a buff has been nullified. Armor break counts as nullifying the buff in this meta.

Pikolu

Return policy: when a buff is nullified, defender gains 60% of a bar of power. Armor breaks count as nullifying an armor up

Opx

Ok thanks