Another month passed without a single update. Is the development team even investigating the problem or did they just give up?

Can we expect an asnwer from development team any time soon? It's been almost a month and still no word. This is a game breaking bug and it still persists.

@ubi-keo the problem still persists after the last update and with updated graphic drivers. What changed is that this time sail unfold option worked. You can check the video under the link: '>

After the seasonal event started the longboat disappeared when in England. It can be summoned, but it's invisible along with the crew. When summoned in port it's stuck and can't be moved even though player can take command. Regardless of the summoning position, the sail fold/unfold order does not work. When starting a raid - still possible with invisible longboat - crew does not join the fight. Problem persists in England, despite fast travel, sleeping, modifying the ship or progressing the game. It does not affect the ship in norway or the river raid boat.
The problem concerns multiple save files. Reloading very old save made the longboat appear again, but it's always invisible on all newer ones.