Outputting auto bracket function names when typing fast

First off, this plugin is great, I wish I'd found this earlier! Anyway, I was using this alongside the [Auto-Pairs](https://github.com/jiangmiao/auto-pairs) plugin, and occasionally would get some strange output. After a while, I managed to work out how to reproduce this - if I type a letter, followed in quick succession by a space or backspace, I get the following output respectively:

`t=AutoPairsSpace()`
`t=AutoPairsDelete()`

It also added the equals sign. I hoped it was a problem with AutoPairs, so I switched to [lexima.vim](https://github.com/cohama/lexima.vim), but had the same issue:

`t=lexima#insmode#_map_impl('')`
`t=lexima#insmode#_map_impl('')`

I figure these are too similar not to be related. Have you any idea how I could prevent this from happening? Thanks, and thanks for this plugin too!

Edit: sorry, I forgot to mention I'm using Vim 8.2 in an msys2 terminal in Windows 10. I'm gonna boot up my Linux vm and see if it happens there too.

Edit 2 : Yeah, it's happening on my LInux boot too. Linux Mint 20.3, with vim 8.2

Start by reproducing the issue in Vim 8.2 with Auto-Pairs or lexima.vim, typing a letter followed quickly by Space or Backspace. Trace which completion or insert-mode mapping emits the function name and equals sign; done means those keystrokes insert only the expected space or deletion without plugin function text.

Written by the indexing model from the issue text.