I have noticed that using folder-color plugin or selecting different color folder icon to change the color of Dolphin folder has the bug that the Dolphin randomly restores the color of folder to default blue.

Kindly guide me on clearing this issue so that my color selection of folder does not change by itself.

Edited Now
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Somehow kde is keeping track of one of my folder's color and reset it to default blue after restart. But if i moved to another location, its color did not get restore upon restart.
I have disabled baloo and the index database file from .local/share/baloo but something is still keeping track of that particular folder.

Problem Seems to be Solved
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I deleted the thumbnail folder of kde cache and the problem seemed to be ok for now.