Today I found 50 coins in pos but they are not visible anywhere in their wallet! what? was it an empty block? why can't I see him !! ??
That means u have an orphan, somebody else found the same block faster as you.
Are you using the newest wallet version released yesterday? U should enable precomputing, this will handle the zerocoin stakes much faster (so less change on an orphan!)
Precompute must be enabled ??
Precompute must be enabled indeed. Are you using the latest wallet version (released yesterday)? https://github.com/Veil-Project/veil/releases
Version 1.0.3.0 is the newest release, make sure u are up to date!
When u start the wallet u will see 2 button on the bottom, 1 is for activate/disable stake and the other button is for precomputing