Snippets does not undo with repeated placeholders

[lopi-py]

Make sure you have done the following

• I have updated to the latest version of blink.cmp
• I have read the README

Bug Description

The snippets undo normally, but if there is a repeated placeholder (${1} in this case), the undo gets stuck

~/.config/snippets/lua.json

{
    "foo": {
        "prefix": "foo",
        "body": [
            "${1:foofoofoo}",
            "",
            "${1}"
        ]
    }
}

steps:

• nvim a.lua
• type foo and accept the snippet
• press esc to enter normal mode
• press u to undo

Relevant configuration

accept = {
  -- bug happens
  create_undo_point = true,
  -- fine
  create_undo_point = false,
},

neovim version

NVIM v0.10.2

blink.cmp version: branch, tag, or commit

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