Sidebar rolls down again even if only switch tab.

[tisonkun]

Describe the bug

Sidebar rolls down again even if only switch tab.

To Reproduce

See the gif below.

Expected behavior

Sidebar should not roll down again at this case.

Screenshots

Desktop (please complete the following information):

• OS: Darwin MacBook-Pro 19.6.0 Darwin Kernel Version 19.6.0: Tue Jan 12 22:13:05 PST 2021; root:xnu-6153.141.16~1/RELEASE_X86_64 x86_64
• Browser chrome
• Version Version 91.0.4472.114 (Official Build) (x86_64)

Additional context Add any other context about the problem here.

@gozssky

[YiniXu9506]

Done. Details can be referred to #179.