It is known issue, and workaround has been implemented:
To fight the Snow Blues Skill bug, a workaround has been implemented.
The level requirement for Snow Blues Level 1 and 2 is now set to Level 49.
Due to the fact that skilling Snow Blues Level 1 is bugged in 95% of all cases, the Skill Point cost has been reduced to 0.
Due to the Skill Point costs for Snow Blues Level 1 being set to zero, the costs of Snow Blues Level 2 have been increased slightly from 15 to 20.
All additional Snow Blues Skill Levels stay untouched and will need 15 Skill Points each as usual.
IMPORTANT: Using the Workaround
If you have reached Level 49 and you're able to skill Snow Blues, please skill Snow Blues Level 2 immediately after Level 1 without confirming Level 1 before. Press the '+' button on the Snow Blues skill twice (until it has reached Level 2) without pressing "OK" in between.
What happens if my Level 47 Snow Blues Level 1 is already skilled and working?
It will be disabled until you reach Level 49. At level 49 it will activate itself automatically again. We recommend increasing to Level 2 immediately then.
This workaround will be reverted back to normal the day this bug can be resolved properly.
If you already set skill to lvl1, you may need to reset skills and put it straight to lvl2.
Edited by Nobbye, 24 August 2015 - 07:27 AM.