Not working and having low liquidity are two very different things.

Magi uses its own liquidity pools meaning Hive and HBD prices will fluctuate as its an open market. So you can search for arbitrage opportunity against other markets.
As liquidity deepens the price fluctuations will be lower.

This is just normal open market dynamic. Why I basically screenshot the exact same trade you screenshot.

For about 1000 Hive you should be generally fine.