diff --git a/src/nvim/window.c b/src/nvim/window.c
index f3b88f7a0b..6179c33b65 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -1364,6 +1364,7 @@ win_T *win_split_ins(int size, int flags, win_T *new_wp, int dir, frame_T *to_fl
     // make the contents of the new window the same as the current one
     win_init(wp, curwin, flags);
   } else if (wp->w_floating) {
+    WinStyle saved_style = wp->w_config.style;
     ui_comp_remove_grid(&wp->w_grid_alloc);
     if (ui_has(kUIMultigrid)) {
       wp->w_pos_changed = true;
@@ -1388,6 +1389,8 @@ win_T *win_split_ins(int size, int flags, win_T *new_wp, int dir, frame_T *to_fl
     // non-floating window doesn't store float config or have a border.
     merge_win_config(&wp->w_config, WIN_CONFIG_INIT);
     CLEAR_FIELD(wp->w_border_adj);
+    // Restore WinConfig style. #37067
+    wp->w_config.style = saved_style;
   }
 
   // Going to reorganize frames now, make sure they're flat.
diff --git a/test/functional/api/window_spec.lua b/test/functional/api/window_spec.lua
index bb18143749..6887284caf 100644
--- a/test/functional/api/window_spec.lua
+++ b/test/functional/api/window_spec.lua
@@ -3478,5 +3478,34 @@ describe('API/win', function()
         pcall_err(api.nvim_win_set_config, old_curwin, { win = other_tp_win, split = 'right' })
       )
     end)
+
+    it('minimal style persists through float-to-split and buffer change #37067', function()
+      -- Set all options globally
+      command('set number relativenumber cursorline cursorcolumn spell list')
+      command('set signcolumn=yes colorcolumn=80 statuscolumn=%l foldcolumn=2')
+      local buf1 = api.nvim_create_buf(false, true)
+      local win = api.nvim_open_win(buf1, true, {
+        relative = 'editor',
+        width = 10,
+        height = 10,
+        row = 5,
+        col = 5,
+        style = 'minimal',
+      })
+      -- Convert to split then change buffer
+      api.nvim_win_set_config(win, { split = 'below', win = -1 })
+      local buf2 = api.nvim_create_buf(false, true)
+      api.nvim_win_set_buf(win, buf2)
+      eq(false, api.nvim_get_option_value('number', { win = win }))
+      eq(false, api.nvim_get_option_value('relativenumber', { win = win }))
+      eq(false, api.nvim_get_option_value('cursorline', { win = win }))
+      eq(false, api.nvim_get_option_value('cursorcolumn', { win = win }))
+      eq(false, api.nvim_get_option_value('spell', { win = win }))
+      eq(false, api.nvim_get_option_value('list', { win = win }))
+      eq('0', api.nvim_get_option_value('foldcolumn', { win = win }))
+      eq('auto', api.nvim_get_option_value('signcolumn', { win = win }))
+      eq('', api.nvim_get_option_value('colorcolumn', { win = win }))
+      eq('', api.nvim_get_option_value('statuscolumn', { win = win }))
+    end)
   end)
 end)