Why when i'm starting render - skin is becoming unselected?
Restaring the program helped when small animation was on render. But when i tried to render sequence that have 600 frames, each 2000px height - i needed to restart program 2 times to make it work.

In soft it looks like:

Result looks like:

PS:

Spine Launcher 3.8.81
Esoteric Software LLC (C) 2013-2020 | http://esotericsoftware.com
Windows 10 Enterprise x86 10.0
Up to date: Spine 3.8.86
Spine 3.8.86 Professional
Licensed to: *****, *****
NVIDIA Corporation, GeForce GTX 1080 Ti/PCIe/SSE2, 4.6.0 NVIDIA 432.00
Started.
OpenAL 1.1, Default audio device