Its related to corp finances.   This reset happens whenever anything generates a report in the finance page.  To verify have your corp finances open and teraforming open on another account.  Do a payout of 1 nic to any member of the corp.  As soon as you hit ok your teraforming will reset.    If you produce on the company account, it registers a ticker too.  With the heavy production of our corp your lucky to get 20 seconds of teraforming done.