The universal spell power granted from having a runearm charged (battle engineer cores) doesn't always get applied. When it does, it only lasts for a second or two, even if you are still building charge or maintain the current charge tier. With the first two core abilities (+8 spell power at tier 1, and +16 at tier 2,) only the first tier buff shows up and not the second. It seems like the buff is encountering a cooldown that's preventing it from being applied or upgraded to the next tier.
I haven't tried this with more of the core abilities recently. I'm also not sure if this is specific to my build/gear. Is anyone else encountering this issue?