Redmine

We have fixed this in the Planio theme with the following js snippet:

    // fixes https://bugs.chromium.org/p/chromium/issues/detail?id=890248
    // applied to chrome on windows and linux
    var isChrome = !!window.chrome && (!!window.chrome.webstore || !!window.chrome.runtime);
    if ((navigator.appVersion.indexOf("Win") != -1 || 
      navigator.appVersion.indexOf("Linux") != -1) && 
      isChrome
    ) {
      $('textarea').on('keydown', function(event) {
        if (event.key === 'PageUp' || event.key === 'PageDown') {
          const cursorPosition = event.key === 'PageUp' ? 0 : event.target.textLength;

          event.preventDefault();
          event.target.setSelectionRange(cursorPosition, cursorPosition);
        }
      });
    }