The drop down for relay moderators, the copy button at the bottom, and the sign in button. I initially went to the sign in button and clicking it did nothing, so I clicked the others to test them. After 30-60 seconds they became responsive. I suspect something is being loaded on page load and takes longer than the elements for some reason. It may be cached after the first use, but people will probably think it's broken
Discussion
I didnt test anything else.
For what it's worth, current Brave is the mobile browser. Getting in the weeds, Brave's filters could be checking things before loading them and slowing something down, but I'm not sure how exactly they work so I'm just guessing. Either way, that would still be quite slow.