Some commands don't clear in Tmux (showcmd)

[amcsi]

I have done a bisect to find out why some commands don't clear from showcmd in my vim in tmux, and I found that this plugin, and to precise the commit 2523def is the culprit.

E.g. I want to type ri to replace the character my cursor is on to "i"
Expected: after "r" shows in showcmd, then "i" is pressed, showcmd should be cleared
Actual: showcmd is not cleared