From cryptic entries posted by KISAKI, SUI, and MIZALY, it appears that a member of LIN (凛 -THE END OF CORRUPTION WORLD-)'s sound production team has passed away.
None of the entries actually say who it was, but it was someone who was “indispensable to LIN (凛 -THE END OF CORRUPTION WORLD-)'s sound” and who had worked with KISAKI for about 5 years now on LIN (凛 -THE END OF CORRUPTION WORLD-) and KISAKI PROJECT releases. I wonder if it was their sound advisor from great White wall...
Unfortunately, 凛 -THE END OF CORRUPTION WORLD- has cancelled recording on whatever they were planning to release.