Any LT door (sliding door, and just door) are rendered normally during gameplay, but when viewing replay they are becoming invisible as soon as they start moving, and getting visible again when it stops.

That's no surprise, it's definitely not an issue of the ReplayMod. LT does things in a different way.

Here is its GitHub if needed: https://github.com/CreativeMD/LittleTiles

That's no surprise, it's definitely not an issue of the ReplayMod. LT does things in a different way.

Correct me if I'm wrong but Replay mod is not like those ship mods or Create mod - its replaying everything, to view a replay you go to "replay viewer" from Mc MAIN menu (replays are recorded in separate files, they dont even need source worlds), its like you connected to a server in spectator game mode while actually server is replay instaed

obviously some packets get lost ... or there are other things which go wrong. It's hard to tell what happens.