On current landing page (https://layerjs.org) when using the “show full example” buttons, the frame is enlarged. Very often this results in scrolling to the end of the page being not possible.
In principle the size observers should detect this and adapt the scroll helper. this may not happen here for some reason.
this is introduced only recently with the new routers. One cause could be that there is a "scroll to anchor” is active and the showFrame is prevented due to “intransition=true”