Created new fresh project and cloned the most up to date 6000 branch , the editor keeps spamming this error :
Trying to draw gizmos while inside a renderpass. This is not supported, gizmo drawing will be skipped. UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)
Disabling gizmos seems to solve it , i have swapped to my own custom drawing gizmos , but some plugins rely on it so would be nice to have .