Salty water occasionally when showering
Forgot to update. The water conditioning company said it's not because of the regeneration time.

They said that it's a fairly common issue where drain and/or control valves are dirty and either need to be cleaned or replaced. In my case they replaced both types of valves.

They also advised me to run cold water (not hot) until the saltiness passed. That way the salty water wouldn't get in the hot water tank.