How to setup correct Vim mode switching in Webstorm?

Question

webstorm

Used to using Vim in Sublime and VSCode. To switch modes, instead of Esc, I always used sequential pressing of the d, f keys. Everything works great. But in Webstorm, after setting the hotkeys, the reaction occurs only from the second press. Those. to switch, you must press the combination twice. Has anyone encountered this problem? How to fix?