Content Type Hub not showing all site column at contentType hub level

I am facing weird issue. I created 4 content type through code and deployed WSP on site. All site columns were present in Content Type. But suddenly, after almost 6 months I am not able to see all site columns(only 10-11 columns are visible currently) in that same content type. I tried retracting and again deploying the same solution. still no luck. tried running both timer job. Not understanding the exact cause of this. Please suggest