<tab> does not jumps from ultisnips placeholder ${1:default} to $0

[ghost]

Say I have a snippet

snippet nt "note" b
\\note{
    $1
    $0
}
endsnippet

After I expand the snippet, I am able to jump from $1 to $0 using <tab>. But if I change $1 to ${1:default} to have a default text, the jump no longer works with <tab>. It still works with ultisnips forward trigger <C-right>. Here are my relevant mu-complete and ultisnips settings:

    Plug 'lifepillar/vim-mucomplete'
    set completeopt-=preview
    set completeopt+=menuone,noselect

    " Define default completion chain
    let g:mucomplete#chains = { 'default':
                \ [ 'ulti','omni','keyn','keyp','tags','path','line'] }

    Plug 'sirver/ultisnips'
    let g:UltiSnipsExpandTrigger="<C-right>"
    let g:UltiSnipsJumpForwardTrigger="<C-right>"
    let g:UltiSnipsJumpBackwardTrigger="<C-left>" 
    let g:UltiSnipsSnippetDirectories=["~/dotfiles/nvim/UltiSnips"]
    " Play nicely with mucomplete
    let g:ulti_expand_or_jump_res = 0
    fun! TryUltiSnips()
        if !pumvisible() " With the pop-up menu open, let Tab move down
            call UltiSnips#ExpandSnippetOrJump()
        endif
        return ''
    endf

    fun! TryMUcomplete()
        return g:ulti_expand_or_jump_res ? "" : "\<plug>(MUcompleteFwd)"
    endf

    let g:mucomplete#no_mappings  = 1 " Don't do any mappings I will do it myself

    " Extend completion
    imap <expr> <S-tab> mucomplete#extend_fwd("\<right>")

    " Cycle through completion chains
    imap <unique> <c-'> <plug>(MUcompleteCycFwd)
    imap <unique> <c-;> <plug>(MUcompleteCycBwd)

    " Try to expand snippet if fails, try completion.
    inoremap <plug>(TryUlti) <c-r>=TryUltiSnips()<cr>
    imap <expr> <silent> <plug>(TryMU) TryMUcomplete()
    imap <expr> <silent> <tab> "\<plug>(TryUlti)\<plug>(TryMU)"
    " Autoexpand if completed keyword is a snippet
    inoremap <silent> <expr> <plug>MyCR mucomplete#ultisnips#expand_snippet("\<cr>")
    imap <cr> <plug>MyCR

[lifepillar]

You need to change the default text before jumping.

[lifepillar]

I don't know what UltiSnips is doing under the hood, but apparently Tab is disabled until you change the text, i.e., pressing Tab while on default does not trigger the plug.

[ghost]

I am able to jump without changing the default text if I use <C-right> instead of <tab>. Only when I try to go the mucomplete way the tab won't allow me jump.

[ghost]

@lifepillar I looked through ultisnips keymappings and found that when there is a default value for a placeholder, ultisnips changes the mode to SELECT. To jump to next placeholder then requires mapping <tab> in SELECT mode as well. I added the following in my configuration:

 snoremap <silent> <tab> <Esc>:call UltiSnips#ExpandSnippetOrJump()<cr>

And now I am able to jump from default value. Might be a good idea to include in the documentation. What say?