The problem is that Aeon MQ6 is taken poster exclusively from FanArt. In add-on FanArt is transferring to the listitem element, which plays setResolvedUrl function. In Kodi there is a small bug, regarding setResolvedUrl function. Bug ignores ListItem.setArt(...). Thus, make Aeon MQ6 to see the posters only by making adjustments in skin code:

File:  Kodi \ addons \ skin.aeonmq6 \ 720p \ IncludesVariables.xml

Block:

     <variable name="value_thumbfullscreen">

     ...
     <value condition="!IsEmpty(Player.Art(thumb))">$INFO[Player.Art(thumb)]</value>
     </variable>


    
(!)   Add it after other value condition, before closing the block </variable>


To lazy to do it now fixed IncludesVariables.xml from version 3.3.0:

IncludesVariables.xml
PROBLEM WITH POSTERS ON AEON MQ6