For me its the shots with bright sunlight hitting white surfaces, so at 18s, the front of the house flickers, at 32 especially the pools of light flicker, and at 1min the wall flickers.
Its not an FG thing is it? I take it you used append to map rather than regenerating every frame? Other than that I thought it might just be an encoding problem.
Thanks for your feedback,its because of the Vimeo encoding I think,I noticed some weird pixel behavior on some frames too,its not an FG problem,in the renders every things is ok.
As you said I used append to map on most of the shots,I got FG flicker on the kitchen shot,on the floor,if you see closely you will notice it
,other than that its encoding issues.