sorry, I don't understand the question. You are stating that the status of a task is continuously being set to 'in progress' although you are setting it to 'in progress' a lot of times. This seems kind of contradictory. Please clarify. Do you mean that you are setting it back to 'ready' a lot of times?
can you give me more information? Is this a leaf task? does it have actuals set, ERE, Percent complete? Does it have a resource assigned? Is Microsoft Project integrated for this problem? Does it only happen for one task or multiple ones?
there's simply not enough information provided here.
If possible, add a screenshot for better visibility and explain which task is the problem.