[Admin] - 2nd Option Type is lost, can't add to existing product

[adomokos]

Solidus Version:
4.3.4

To Reproduce
Create a product in the new Solidus Admin, assigning two Option Types works. Don't change anything on the Product form, click update and the 2nd Option Type is removed. When I try to add it back, it's not persisted.

1. Go to Solidus Admin
2. Add a Product with two Option Types
3. Edit the product
4. Hit save
5. 2nd Option Type is removed (lost)

Current behavior
The 2nd Option Type is removed (lost) when I edit the product.

Expected behavior
The 2nd Option Type should be kept when I edit the product. I should also be able to add the 2nd Option Type.

Screenshots

solidus-admin-option-type-not-saved.mov

Desktop (please complete the following information):

• OS: Mac OS Sonoma 14.4.1
• Browser Chrome
• Version 124.0.6367.119 (Official Build) (arm64)

Additional context
Legacy admin works as a workaround.

Rails logs:

Started PATCH "/admin/products/t-shirt-bsmg-tshirt" for ::1 at 2024-05-08 10:11:41 -0500
Processing by SolidusAdmin::ProductsController#update as HTML
  Parameters: {"authenticity_token"=>"[FILTERED]", "product"=>{"name"=>"t-shirt", "slug"=>"t-shirt-bsmg-tshirt", "description"=>"Amazing 100% cotton t-shirts.", "store_ids"=>"1", "taxon_ids"=>"", "option_type_ids"=>"1,2", "meta_tit
le"=>"", "meta_keywords"=>"[FILTERED]", "meta_description"=>"", "price"=>"0.00", "cost_price"=>"", "cost_currency"=>"USD", "available_on"=>"2024/03/01", "discontinue_on"=>"", "promotionable"=>"1", "sku"=>"BSMG-TSHIRT", "shipping_ca
tegory_id"=>"1", "tax_category_id"=>""}, "button"=>"", "id"=>"t-shirt-bsmg-tshirt"}
  Spree::User Load (0.8ms)  SELECT "spree_users".* FROM "spree_users" WHERE "spree_users"."deleted_at" IS NULL AND "spree_users"."id" = $1 ORDER BY "spree_users"."id" ASC LIMIT $2  [["id", 1], ["LIMIT", 1]]
  ↳ config/initializers/spree_authentication.rb:7:in `spree_current_user'
  Spree::Role Load (0.6ms)  SELECT "spree_roles".* FROM "spree_roles" INNER JOIN "spree_roles_users" ON "spree_roles"."id" = "spree_roles_users"."role_id" WHERE "spree_roles_users"."user_id" = $1  [["user_id", 1]]
  Spree::Product Load (1.9ms)  SELECT "spree_products".* FROM "spree_products" WHERE "spree_products"."deleted_at" IS NULL AND "spree_products"."slug" = $1 LIMIT $2  [["slug", "t-shirt-bsmg-tshirt"], ["LIMIT", 1]]
  TRANSACTION (1.1ms)  BEGIN
  Spree::Store Load (0.9ms)  SELECT "spree_stores".* FROM "spree_stores" WHERE "spree_stores"."id" = $1  [["id", 1]]
  Spree::Store Load (1.0ms)  SELECT "spree_stores".* FROM "spree_stores" INNER JOIN "bsmg_product_stores" ON "spree_stores"."id" = "bsmg_product_stores"."store_id" WHERE "bsmg_product_stores"."product_id" = $1  [["product_id", 31]]
  Spree::Taxon Load (3.3ms)  SELECT "spree_taxons".* FROM "spree_taxons" INNER JOIN "spree_products_taxons" ON "spree_taxons"."id" = "spree_products_taxons"."taxon_id" WHERE "spree_products_taxons"."product_id" = $1  [["product_id"
, 31]]
  Spree::OptionType Load (1.0ms)  SELECT "spree_option_types".* FROM "spree_option_types" WHERE "spree_option_types"."id" = $1 ORDER BY "spree_option_types"."position" ASC  [["id", 1]]
  Spree::OptionType Load (0.9ms)  SELECT "spree_option_types".* FROM "spree_option_types" INNER JOIN "spree_product_option_types" ON "spree_option_types"."id" = "spree_product_option_types"."option_type_id" WHERE "spree_product_opt
ion_types"."product_id" = $1 ORDER BY "spree_option_types"."position" ASC  [["product_id", 31]]
  Spree::ProductOptionType Delete All (1.5ms)  DELETE FROM "spree_product_option_types" WHERE "spree_product_option_types"."product_id" = $1 AND "spree_product_option_types"."option_type_id" = $2  [["product_id", 31], ["option_type
_id", 2]]
  Spree::Variant Load (1.1ms)  SELECT "spree_variants".* FROM "spree_variants" WHERE "spree_variants"."product_id" = $1 AND "spree_variants"."is_master" = $2 LIMIT $3  [["product_id", 31], ["is_master", true], ["LIMIT", 1]]
  Spree::Price Load (1.6ms)  SELECT "spree_prices".* FROM "spree_prices" WHERE "spree_prices"."variant_id" = $1  [["variant_id", 164]]
  Spree::Variant Exists? (1.8ms)  SELECT 1 AS one FROM "spree_variants" WHERE "spree_variants"."sku" = $1 AND "spree_variants"."id" != $2 AND "spree_variants"."deleted_at" IS NULL LIMIT $3  [["sku", "BSMG-TSHIRT"], ["id", 164], ["L
IMIT", 1]]
  Spree::Product Exists? (0.5ms)  SELECT 1 AS one FROM "spree_products" WHERE "spree_products"."slug" = $1 AND "spree_products"."id" != $2 LIMIT $3  [["slug", "t-shirt-bsmg-tshirt"], ["id", 31], ["LIMIT", 1]]
  FriendlyId::Slug Load (2.2ms)  SELECT "friendly_id_slugs".* FROM "friendly_id_slugs" WHERE "friendly_id_slugs"."sluggable_id" = $1 AND "friendly_id_slugs"."sluggable_type" = $2 ORDER BY "friendly_id_slugs"."id" DESC LIMIT $3  [["
sluggable_id", 31], ["sluggable_type", "Spree::Product"], ["LIMIT", 1]]
  TRANSACTION (3.5ms)  COMMIT
Redirected to http://localhost:3100/admin/products/t-shirt-bsmg-tshirt
Completed 303 See Other in 64ms (ActiveRecord: 27.8ms | Allocations: 28599)

[thomas-profitt]

This same problem happens in our freshly-built solidus 4.3.4 & rails 7.1.3.2 project when we try to add multiple taxons.

Legacy admin works as a workaround.

Thank you!