Selenium 3.0 + gecko: The text written in the text box is deleted

Using selenium 3.0 together with gecko, the application runs apparently well but when you get the text filled in a box, write the text and delete it before you can use it in the next step. It happens in searches, login ... Before the version update everything worked fine. Example code: *

driver.FindElement(By.Id("Email")).Clear();
driver.FindElement(By.Id("Email")).SendKeys(CurrentValidationTest.User);
driver.FindElement(By.Id("Password")).Clear();
driver.FindElement(By.Id("Password")).SendKeys(CurrentValidationTest.Password);
driver.FindElement(By.Id("login")).Click();

* Does anyone know how to solve it? Did someone have a similar problem?