'jumping' test results span

Displaying the list of tests (pushed with jtests from CI) is weird. Failed tests is about impossible to display, divs on page jumps (guess - folds/unfolds) the way impossible to have whole list on the screen M.b. that is browser feature, but can't check on another one. Whole page of tests is scrollable. Area with list of tests also scrollable. Area with results of a test also scrollable. Seems that scrollings + active scripts conflicts with each other. If I want to look details of failed test - whole pane with tests begin to scroll. Once bottom of test's area reach the bottom of all tests's area - it seems that all individual test's areas folded and scrolling jumps somewhere far down. You can look and try on https://gitlab.com/manticoresearch/dev/-/pipelines/167444839/test_report (feel free, project is open-source) Also I've recorded screenrecord: https://yadi.sk/d/2GftWYFwG_PkOg There I just slowly (literaly - one-by-one 'tick' of mouse wheel) up and down, and several times scroll both directions on strange place where shit happens.