There's been a fair amount of conjecture about him not seeing himself as a full back. He got a loan move to the Albion last season and apparently insisted on a CM role.
Reading the Athletic earlier the player has said he wants to play as a RB, he wants to come to Everton and is demanding talks with Arteta. Arsenal have, Bellerin who wants out, Chambers, Cedric and Maitland-Niles. Their fans are running something like, Bellerin should go, Chambers and Cedric not good enough, Maitland-Niles is the one to keep.
I suspect it gets done tomorrow.