material editor→viewpoint panel don't update lively

Hello, I have met a question in the material editor. When I create a material, and i want to edit it in the material editor. Then, I’ve changed its base color. But it did not change its base color in the view point panel. I am sure tha i have opend the “live update” as the picture. I don’t know if i’ve changed some settings. I will appreciate it very much if some gus could help me, this has disgusted me for a long time. THANKS!!!

Hey there @SSSSmartCCCCCity! Welcome to the community! So your live update settings are correct right now so it’s not likely that this is the issue here. You may have realtime rendering off in the viewport itself! To check this, open up the little menu here and check to see if Realtime is checked or not.

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Thanks for your reply!!!
I have checked it, and i found that i have kept the realtime checked. I don’t know if there were some unknown bugs.

Does this apply to all materials? You don’t have any errant nodes taking over the preview?

YES. It apply to all materials.
I have solved this question, but i still ddn’t know what the problem it is.
I reinstalled my system, all system drive and Unreal Enginee. Then the material editor became normal.
Anyway, thank you very much for your help!!!

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