Right-clicking with an empty map in creative mode in 19w06a does not fill the map - instead you get a brief movement as if putting the map away, and the map remains empty.  Maps seem to work fine in survival and adventure mode. 

Steps to reproduce:

• Open a world in 19w06a
• Put yourself in to creative mode (/gamemode creative)
• Give yourself a map (/give @p minecraft:map)
• Use right-click to fill the map - observe that this does not work, the map is still empty

Expected result is as per survival mode:

• Open a world in 19w06a
• Put yourself in to survival mode (/gamemode survival) or adventure mode (/gamemode adventure)
• Give yourself a map (/give @p minecraft:map)
• Use right-click to fill the map - the map should now be filled

This works as expected in 19w05a