fix(Table): loading crash fix #3369

[bindoon]

loading 后不再有层级变化，所以 ref 也不会再重新计算。

[codecov]

Codecov Report

Merging #3973 (69516fc) into feat/1.26 (812e0f2) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##           feat/1.26    #3973      +/-   ##
=============================================
- Coverage      90.44%   90.42%   -0.02%     
=============================================
  Files            306      306              
  Lines          18008    17929      -79     
  Branches        5432     5406      -26     
=============================================
- Hits           16287    16213      -74     
+ Misses          1700     1695       -5     
  Partials          21       21              

Impacted Files	Coverage Δ
src/table/base-pre.jsx	86.66% <100.00%> (ø)
src/table/base.jsx	93.06% <100.00%> (+0.03%)	⬆️
src/cascader-select/cascader-select.jsx	93.93% <0.00%> (+0.03%)	⬆️

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