What you were expecting to happen, and what actually happened?
I invaded a player worth 1100 gold (before bonuses). Upon victory, I expected to earn roughly 2100 gold. I got 175, the amount I earned from in-match 4- and 5-gem sets. If the game keeps track of who players have invaded, the battle started at roughly 19:00 JST against a level 300-ish opponent, IIRC.
What are the steps to make it happen again?
Heck if I know.
Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
Nothing that would help.
Edit to add: if it helps to identify my opponent, their defense team is three level 1 epic fortress gates that have 8 attack, and a prismatic orbed hero.