Champions page switching. [Client]

So I went to check my friends profile and then went back to mine to check how close I was to level 5 yasuo however my champs were replaced with theirs?? Allowing me to look at their other wise locked champion page I tried this with another and got the same thing I asked him about it and he has yet to respond so I don't if it shows me what champs they have chests for but from what I can tell the level of their champs are there and correct. I have pictures from the first and second time however the first time I had Availability set to Available so the champs I was missing were not there... I tried a third time and it failed despite the fact I did not join a game or close my client so don't know what caused it or how someone would go about doing it.

I don't know why you can't normally check someone's champ list but I assume there is a good reason and thought that this bug is worth an post at least.

Btw I don't think someone can find out who's champ page I uploaded but if asked to remove it I will just providing images of the bug.