Error when filtering multiselection fields

When I open the filter menu in the client, I get the following error message:

ERROR:tryton.common.common:  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/view/screen_container.py", line 547, in icon_press
    self.search_box(widget)
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/view/screen_container.py", line 617, in search_box
    selections = tuple(x[1] for x in field['selection'])
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/view/screen_container.py", line 617, in <genexpr>
    selections = tuple(x[1] for x in field['selection'])

IndexError: string index out of range

And if I write to filter by putting a colon, the client throws an error and goes into a loop without letting me do anything. I have to close it and open it again

ERROR:tryton.common.common:  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/view/screen_container.py", line 541, in keypress
    self.update()
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/view/screen_container.py", line 397, in update
    res = self.screen.search_complete(self.get_text())
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/gui/window/view_form/screen/screen.py", line 269, in search_complete
    return list(self.domain_parser.completion(search_string))
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/common/domain_parser.py", line 685, in completion
    for complete in self.complete(ending):
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/common/domain_parser.py", line 746, in complete
    for comp in complete_value(field, value):
  File "/home/pc/.virtualenvs/tryton60/lib/python3.8/site-packages/tryton/common/domain_parser.py", line 431, in complete_selection
    for svalue, test in field['selection']:

ValueError: not enough values to unpack (expected 2, got 1)

I have explored and tried things and it only happens with multiselection and if the options are obtained through a get_X. When printing field[selection] in that line screen_container.py I get 'get_types' instead of the tuple with the values

I checked that problem with server 6.0.25 and client 6.0.21 in Work status menu point and Address subdivision types menu points