This is best illustrated here:

This wallet just staked with a single UTXO, 200k in size.  This stake was split into 7 splits of equal size.  All seven of these new inputs have a coin age of 0, thus are not mature enough to stake.  We see on the bottom (in yellow) the wallet has no coins to stake, yet the green arrow on the left remains green and displays a ETTS of 0 seconds.  The arrow should turn grey in this case as the wallet cannot stake until the coins reach maturity.
Additionally here is what the debug log is continuously spitting:
04/29/19 22:33:13 CreateCoinStake: No coins; 
04/29/19 22:33:21 CreateCoinStake: No coins; 
04/29/19 22:33:29 CreateCoinStake: No coins; 
04/29/19 22:33:37 CreateCoinStake: No coins; 
04/29/19 22:33:45 CreateCoinStake: No coins; 
04/29/19 22:33:53 CreateCoinStake: No coins; 
04/29/19 22:34:01 CreateCoinStake: No coins; 
04/29/19 22:34:09 CreateCoinStake: No coins; 
04/29/19 22:34:17 CreateCoinStake: No coins; 
04/29/19 22:34:25 CreateCoinStake: No coins; 
04/29/19 22:34:33 CreateCoinStake: No coins; 
04/29/19 22:34:41 CreateCoinStake: No coins; 
This is a blocker for Denise in my opinion.  Tested on Windows 10 INVESTOR wallet version 4.0.2.2-g38a3c8026-0 (RC).