Dear friends, Update on the question below. Attached you will find data about my system. For a better understanding I have created this video. https://cloud.haller.family/s/Zyt9DFoCnFwtgn8 Description of the video: From the form I call up the homepage ostseesattel.com. Then I click on the guestbook form. Unfortunately you cannot see the pointer. There is no reaction. Then I change the tab back and forth. Now the guestbook can be clicked on. Why is that? Kind regards Uwe Dear friends, I am using Firefox Browser 127.0.2 (64-bit) on a PC. Sometimes it happens that an input field on a page in an IFRAME cannot be clicked. The buttons work, but you can't enter anything in the text field. Only when I press in the address bar and then in the text field, now I can enter text in the text field. Example page https://www.fantastic-food.ch Then click on the "Feedbacks" link. Does anyone have an idea? Kind regards Uwe Translated with DeepL.com (free version)