Emacs kill ring is not working reliably

I use the pre-installed Emacs keymap with IntelliJ IDEA Ultimate 2020.2.2 version. There is an annoying bug. Every time I use the Emacs keymapping <ctrl>-K to kill from the cursor to the end of line and the text should go to the "emacs kill ring" and when I go to another location and give yank command (<ctrl>-Y) the killed text should come from the kill ring to the new place. Usually it comes, but about every fifth time it doesn't (and something else comes from the kill ring).

This is especially annoying since when killing text (with <ctrl>-K) the text does disappear - therefore the user thinks that the text really is in the emacs kill ring. And when the user goes to another location in the editor and yanks the text from the kill ring (<ctrl>-Y) the user assumes that the text should be yanked here since it disappeared when previously killing.

I contacted IntelliJ IDEA support and got an answer to disable all my plugins. I hope someone knows how to fix this issue without debugging by disabling/enabling the plugins one at a time.