Specially if you use ideavim plugin with any Jetbrains IDE, you will need to disable this option to navigate through the code.

First things first… Close (quit) from your IDE.

I recommend that you run the following command to check exactly application name:

# you can replace pycharm with any IDE's name. e.g. goland, intellij...
defaults find pycharm | grep pycharm

Then you can run the following command:

# in this example '.ce' is for pycharm community edition
defaults write com.jetbrains.pycharm.ce ApplePressAndHoldEnabled -bool false