Impleum wallet stake does not go below 1day ?
Proof-of-Stake is random and based on luck.
If the "Days to Stake" is overdue, that does not mean that something is wrong. Again, PoS is random.
It’s based on 1) the amount you are staking, and 2) the network weight (which is the total amount being staked by everybody), found by hovering over the icon on the lower left side of the wallet.
For more information, see FAQ:
https://impleum.com/#faq