Complex substitute command not working

[mizlan]

Hydra({
  name = 'Coordinate manipulation',
  mode = 'n',
  body = '<Leader>c',
  heads = {
    { 'h', [[<Cmd>s/(\zs-\?\d\+\.\?\d*\ze,\s*-\?\d\+\.\?\d*)/\=str2float(submatch("0"))-0.1<CR>]] },
    { 'l', [[<Cmd>s/(\zs-\?\d\+\.\?\d*\ze,\s*-\?\d\+\.\?\d*)/\=str2float(submatch("0"))+0.1<CR>]] },
    { 'j', [[<Cmd>s/(-\?\d\+\.\?\d*,\s*\zs-\?\d\+\.\?\d*\ze)/\=str2float(submatch("0"))-0.1<CR>]] },
    { 'k', [[<Cmd>s/(-\?\d\+\.\?\d*,\s*\zs-\?\d\+\.\?\d*\ze)/\=str2float(submatch("0"))+0.1<CR>]], { desc = 'small incrs'} },
    { 'H', [[<Cmd>s/(\zs-\?\d\+\.\?\d*\ze,\s*-\?\d\+\.\?\d*)/\=str2float(submatch("0"))-1<CR>]] },
    { 'L', [[<Cmd>s/(\zs-\?\d\+\.\?\d*\ze,\s*-\?\d\+\.\?\d*)/\=str2float(submatch("0"))+1<CR>]] },
    { 'J', [[<Cmd>s/(-\?\d\+\.\?\d*,\s*\zs-\?\d\+\.\?\d*\ze)/\=str2float(submatch("0"))-1<CR>]] },
    { 'K', [[<Cmd>s/(-\?\d\+\.\?\d*,\s*\zs-\?\d\+\.\?\d*\ze)/\=str2float(submatch("0"))+1<CR>]], { desc = 'large incrs'} },
  }
})

I don't think the hydra works correctly for this, the first works but it does not stay in Hydra state and the future h/j/k/l/H/J/K/L are just normal vim motions. Do I need to escape some backslashes in the string? Note that the exact string works with vim.keymap.set()