I notice that when i use IS EXIST, slow me that element exist even it is shown on website or not, even if i check special box to check if elelement exist on web page
The issue was with window.outerWidth == 0 in BAS, and some startnge code window.outerWidth || window.innerWidth from recaptcha service. If window.outerWidth == 0, so function, which calculates screen width, returned window.innerWidth which was always 304px, because code executed in captcha frame.