Legendary 1 cannot receive rivens from trades if riven seller are invited to the L1's Dojo, says MR has to be a minimum of 8. It works vice versa, however.

[jaded--]

I am Legendary 1 and whenever I invite someone to my dojo to buy their rivens, they always cannot trade due to "MR has to be a minimum of 8". However, when the sellers invite me to their dojos, they can put the same rivens up for trade without any issues or restrictions.