Played Ostara last year, everything worked smooth, popped in on time, didn't bug.
This year the opening Ostara cutscene started in the completely empty festival area, no decorations, no people, no butterflies, nothing BUT the festive sounds (which disappeared after the cutscene). Then the markers for Ostara Quests showed up, but every quest-related item is missing (i.e. archery challenge is missing the aims).
Playing the game on my main save file, everything is done and completed. In the more recent file with Ravensthorpe still on level 0 the materials and some items for the festival are present, waiting for me to finish one of the arcs and level up the village.