Sphere reflection capture in project is flickering as i move the camera around...

Version 4.26, already have TemporalAA on. Original problem was sphere reflection captures were producing a white circle on the ground. Googled it and people were saying to make one sphere reflection capture actor larger then the map so now it’s 40000 in radius. The other smaller sphere reflection captures are flickering as well.

Also when I build lighting and save the project, it still says lighting needs rebuilding when I open the project/map again even though I changed nothing. What is this issue?