"Can't access dead object" in geckodriver

It looks like the frame is reloaded with a new reference while you are waiting for the element some_id. I would classify this issue as a bug since the error returned by the driver is not defined by the WebDriver protocol.

Your best chance to make it work is probably to implement a custom waiter to locate the frame/element and skip unhandled exceptions:

WebElement elem = waiter.Until(elementToBeClickableInFrame(By.id("contentframe"),
                                                           By.id("some_id")));

public static ExpectedCondition<WebElement> elementToBeClickableInFrame(final By locatorFrame, final By locator) {
  return new ExpectedCondition<WebElement>() {

    @Override
    public WebElement apply(WebDriver driver) {
      try {

        driver.switchTo().defaultContent();
        driver.switchTo().frame(driver.findElement(locatorFrame));

        WebElement elem = driver.findElement(locator);
        return elem.isDisplayed() && elem.isEnabled() ? elem : null;

      } catch (Exception e) {
        return null;
      }
    }

    @Override
    public String toString() {
      return "element located by: " + locator + " in " + locatorFrame;
    }
  };
}

Not sure if this will help you but when I ran into this error message, I was able to get past it by having:

driver.switchTo().defaultContent();

driver.switchTo().frame(0);

between each interaction with an element in the iframe.

Example:

driver.switchTo().frame(0);
    myPage.selectElement(getCycleSummary());
    driver.switchTo().defaultContent();
    driver.switchTo().frame(0);
    myPage.selectDisplayedElement(this.getCycleBtn());

Without the driver switches I would receive the dead object error.