RecursionError when reloading editable tree

Hi!
If we mark several records on tree view with editable="1" and click Reload button we get the following message:

  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/view/list.py", line 1066, in __select_changed
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 396, in validate
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 257, in _check_load
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 504, in reload
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 396, in validate
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 257, in _check_load
  File "C:/msys64/home/ced/tryton-6.4-64/tryton/gui/window/view_form/model/record.py", line 504, in reload
  ...
RecursionError: maximum recursion depth exceeded in comparison

If only one record is marked the reload is performed without errors.
In case of tree view with editable="0" the reload also works fine.
Is this a bug in Tryton Client?

P.S. We are using Desktop Client 6.4.
Perhaps this issue is also in Desktop Client 7.x.