Linux 4.26 version is a disaster.
As OpenGL support dropped completely and only Vulkan left it become unusable - crashes every tenth mouse click, landscape editing is broken completely.
Tested with RADV, and AMDGPU-PRO drivers - no difference.
Surprisingly on the same Linux system Windows version of UE 4.26 installed with Wine 6.0 (which uses DirectX to Vulkan calls translations) works without any troubles at all and works MUCH, MUCH faster.
How it’s possible?)))