I'm experiencing an odd behaviour, or a bug, with a website I'm setting up with Lay Theme: https://2019.nomadicarchitecture.ch/
When you use the menu to navigate from category (e.g. Projects) to sub-category (e.g. Newspaper), the sub-menu disappears. However, when you manually (re)load the url of the sub-category (https://2019.nomadicarchitecture.ch/projects/newspaper), everything is fine.
Similarly, when navigating from the sub-category (e.g. newspaper) to a different parent-category (e.g. Clients), the old sub-menu remains visible, overlapping with the new one. Again, manual (re)load does the trick.
It seems that the menu-items don't get their classes updated properly on click / page transitions via JS.
My browser is Chrome 75.0.3770.100.