Hello,
While I was doing the Cresselia quest, in particular the part when you need to wake up sleeping pokemons, I encountered an issue in Celestic Ruins cave.
https://cdn.discordapp.com/attachments/486917686782066704/778369260946718740/bd088de9f5c32d39cd818b8b197a8213.png
As you can see in this picture, my path to Dragonite is blocked because of the Mega-Garchomp quest (Cynthia and her grandma being in my way). I addressed the issue on PRO's discord and I was told to report it here as well, so here it is.