Custom escape keys breaks CTRL-r history search

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General information

Custom escape keys breaks CTRL-r history search.

• Terminal program: iTerm2 3.4.12
• Operating system: macOS Big Sur 11.6
• ZSH framework: oh-my-zsh
• ZSH version: 5.8
• ZVM version: last master

Basic examination

• [x] I have read through the README page
• [x] I have the latest version of zsh-vi-mode
• [ ] I have tested with another terminal program

Problem description

If you redefine ZVM_VI_INSERT_ESCAPE_BINDKEY, it's not possible to enter first character of escape key in CTRL-r history search. You exit the search mode.

Reproduction steps

1. Redefine with ZVM_VI_INSERT_ESCAPE_BINDKEY=fd
2. Enter history search mode with CTRL-r
3. Enter f character
4. Search mode is cancelled, f is inserted in command line

Expected behavior

CTRL-r history search works as usually