Terminal bell rings with each invocation

[flwyd]

When running a mapping for seemingly any textmanip command, e.g. <Plug>(textmanip-move-down), the terminal bell rings, which makes using this plugin very annoying. This occurs in both normal and visual mode. Setting belloff=esc disables this beep, which indicates the cause is hitting from normal mode.

I see that textmanip.vim frequently runs execute "normal! \<Esc>" in several functions, and in some cases it's not obvious that the mode isn't already normal.