label for polymorphic association throws ArgumentError:"Polymorphic associations do not support computing the class"

[imme5150]

I'll try to write a test if you can't reproduce it, but this should be enough details to reproduce:

rails (6.1.7.10)
ransack (4.3.0)
ruby 3.1.7p261

form.haml:

1    = search_form_for [:admin, @search] do |f|
2       = f.label :source_of_Order_type_number_eq do
3           Order Number
4           = f.text_field :source_of_Order_type_number_eq

If I replace line 2 with:
= label_tag 'q[source_of_order_type_number_eq]'
There is no error, and the text_field tag actually works. Also if I run Payment.ransack with source_of_Order_type_number_eq it works and generates the correct SQL

Full stacktrace:
activerecord (6.1.7.10) lib/active_record/reflection.rb:407:in 'compute_class'
activerecord (6.1.7.10) lib/active_record/reflection.rb:366:in 'klass'
ransack (4.3.0) lib/ransack/adapters/active_record/context.rb:96:in 'klassify'
ransack (4.3.0) lib/ransack/context.rb:139:in 'association_path'
ransack (4.3.0) lib/ransack/translate.rb:77:in 'attribute_name'
ransack (4.3.0) lib/ransack/translate.rb:38:in 'block in attribute'
ransack (4.3.0) lib/ransack/translate.rb:37:in 'map'
ransack (4.3.0) lib/ransack/translate.rb:37:in 'attribute'
ransack (4.3.0) lib/ransack/nodes/grouping.rb:24:in 'translate'
ransack (4.3.0) lib/ransack/search.rb:19:in 'translate'
ransack (4.3.0) lib/ransack/helpers/form_builder.rb:35:in 'label'
app/views/payments/form.html.haml:2