wrong cursor position

[Starslayerx]

I asked the problem at coc-issue firstly.
I thought this could caused by my snippet? And the output of :verbose imap <tab> shows

<Tab>       * <C-R>=UltiSnips#ExpandSnippet()<CR>
            ~/.config/nvim/plugged/ultisnips/autoload/UltiSnips/map_keys.vim line 61

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Aftre I updated all my vim plugs and changed python verson to 3.8 recently. Tab doesn's works fine.

Then I press Tab , and I got this

Snippets I defined by myself also has same behavior.

snippet cn
const int ${1:variable} = ${0:number};
endsnippet

After I changed $0 to $2, It works fine.

snippet cn
const int ${1:variable} = ${2:number};
endsnippet

Seems many snippets have this issue

After press Tab

[pilgrimlyieu]

I have same issue sometimes. Does it happen to you every time? If not, I think it is not problem of UltiSnips.