First character is missing inconstantly while sending string to the ExtJS input via sendKeys()

Some times it happens with me. Try clicking on to the field first, but it's a wild guess assuming there can be some focus related issues.Your sequence could be somewhat like this:

wait.until(ExpectedConditions.elementToBeClickable(input)).click();input.clear();input.sendKeys(value);

Weird thing is that I actually faced a situation, where I clicked it twice before sending values and it worked somehow :P

Another thing to try could be using a non-native javascript executor.

JavascriptExecutor myExecutor = ((JavascriptExecutor) driver);myExecutor.executeScript("arguments[0].value='6';", input);

Sorry man, if the system would have been in front of me I'd have tried much more things.

I was struggling with sendKeys failing my self, but the following works pretty consistently. The method findVisibleElement is a custom wrapper for driver.until....

protected static boolean sendKeysByChar(By by, String input){        WebElement field = driver.findVisibleElement(by).base();    field.click();    field.clear();    for (int i = 0; i < input.length(); i++) {        String current = driver.findElement(by).getAttribute("value");        String nextChar = String.valueOf(input.charAt(i));        while (current.length() <= i || !current.endsWith(nextChar)) {            field.sendKeys(nextChar);            current = driver.findElement(by).getAttribute("value");        }    }    field = driver.findElement(by); // Refresh element    if (field.getAttribute("value").equals(input)) { return true; }    log.warn("Send keys by char failed.");    return false;}