Split alignment doesn't work with the arguments --wintype=split --position=belowright

[strboul]

Describe your bug.

Split align keybinding ^W= does work well with the bare :FloatermNew command but it doesn't work when it's with the command arguments of :FloatermNew --wintype=split --position=belowright.

Environment

If you are using neovim, just run :checkhealth floaterm and post the content

below.

health#floaterm#check
========================================================================
## common
  - INFO: Platform: linux
  - INFO: Nvim: NVIM v0.5.0-dev+1259-gfe808f02f
  - INFO: Plugin: 1c63ac0


## terminal
  - OK: Terminal emulator is available

## floating
  - OK: Floating window is available

Configurations related to vim-floaterm in vimrc(i.e. g:floaterm_xxx):

let g:floaterm_autoinsert=0