XLFormViewController jumps when open as ModalFormSheet with assignFirstResponderOnShow

[romanr]

Create XLFormViewController with Form initialization:

 XLFormDescriptor * form;
form.assignFirstResponderOnShow=YES;

Open controller as FormSheet:

vc = [[XLFormViewController alloc] init];
vc.modalPresentationStyle=UIModalPresentationFormSheet;
[(UIViewController*)self presentViewController:vc animated:YES completion:nil];

result: controller opens and jumps to the right or left side of the screen.

[romanr]

It's more of a general issue not necessary specific to XLForm. Looks like it's caused by overlapping FormSheet animation and keyboard animation.