Free Float once an activity starts is not necessarily 0d

Primavera Cloud Scheduling

Once an activity is noted as "started" the calculation for free float automatically goes to 0 days. This is not a true statement. For instance, if Activity X is a 5 day activity is started today and its successor cannot start until day 10 due to another predecessor, the free float for Activity X is 5 days, not 0. Prior to marking the activity as started, I get the correct answer. Is this a setting I can change? Total Float is still calculating properly regardless of activity status.