Hello... yes indeed that stuck issue happened a week after hoenn is released... but later its fixed, but yes we got stuck again if we talk to wattson after put plusle and minun recently...
There are something that may help, first talk to police officer on pc he will ask you to go ask wattson, after that go back to wattson (you might get stuck again)... if you get stuck try to relogging and ask him again...
this usually will work after you talk to him and relogging around 5x
but dont worry everything will be fine and you can continue your transmat system quest after :Smile: