The Luckycoin client often overshoots in the hash rate estimate in these situations.
At one point it showed 2.8 GH/s that was nearly 50x the previous hashing rate.
Anyway the difficulty went from 1 to 23. Never in the lifetime of the coin the difficulty was that high.
As usual all the profit minded miners are now gone and the Luckycoin network hashes at 10 MH/s or less at a difficulty appropriate for a 1GH/s network with block times in the hours.
Titan
Luckycoin Developer