Element-ui tree component after lazy rendering, setting check-strictly is invalid

element-ui tree component
after lazy rendering, set check-strictly
but calling setCheckedKeys still selects the parent node

component introduces and sets

<el-tree
  ref="orgTree"
  :props="props"
  node-key="id"
  default-expand-all
  lazy
  :load="loadNode"
  show-checkbox
  check-strictly
  @check="checkChange"
  style="margin-top: 6px;">
</el-tree>

set the selected keys

this.$refs.tree.setCheckedKeys([this.orgId],true);

originally wanted to select only child nodes, but now the effect is

clipboard.png

is there bug when element ui lazy loading and check-strictly are used together?

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3ccb8-446bf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3ccb8-446bf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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