find mode overriden by normal mode commands

[B1LLP4RK]

when i use / to search and try to search for a word find, fis somehow intercepted by normal mode and whatever i type for the second letter becomes the clicking function in vimium. Same goes on for any letter that has normal mode implementation.

[B1LLP4RK]

2025-04-05.14-36-48.mp4

As you can see i am trying to find the word 'search' using the / command. But for some reason the / only accepts the first letter s, and the following ea is ignored(or doing some normal mode command) and r goes on to refresh the page.

[B1LLP4RK]

FYI i use Korean/English keboard, which maps right alt for switch btw the language, but I am not sure if this is relavant.