This should be a double door, but top and bottom moves separately and disappear after moved. additionaly, sometimes client crash when snow falling.

Crash log http://pastebin.com/thArYzhP

It happens only on multiplay server. I can make doors in backup world of server in single player mode, which have same mods and configs.

Looks like you have not setup the door properly: https://youtu.be/XR5dmXEhGaY?t=13m29s

Could you send me your Map? Maybe i can find out what is going on.

I can send my map, but probably something happening with other mod. I can send mods, configs and maps as a modpack to you, but how can I do it?

You can either upload it via a cloud service or you could join on discord so you could send it to me there (https://discord.gg/W9QM3fS).

It is fixed in LittleTiles v1.3.7. Thanks for reporting this issue.