Can you provide a few more details?
What version of Project (2013, 2016)?
When you say time actuals and planned hours disappeared from the time card, are you referring to actual hours disappearing from the time-scaled cells where daily hours are entered or are you referring to the Actual Work and Work columns on the left side of the time sheet?
Also, what type of task is it? Fixed Duration, Fixed Units, etc.
I’m asking because our organization has been using 2013 timesheets for almost two years and we’ve seen some goofy things happening. These answers may help anyone reading this narrow down the scenario.