Hotfix 18.10.1 Operation Rathuum.

Changes

Kela de Thaym boss fights can no longer be joined once you enter her Arena tile.
Made numerous adjustments to event Audio levels and repetitions
Reduced audio levels on Corrupted Crewmen and Grineer until the new distance sound technology is released.

Fixes

Fixed various crashes and game freezes.
Fixed a crash that would occur during the Kela boss fight.
Fixed a crash that would occur during the Tyl Regor boss fight.
Fixed an issue with Roller spark FX lingering after a host migration.