Somehow my references disappeared during loop cut, Blender didn't crash.
I have my reference collection with all the elements inside, I enable the selection and still nothing appears on my screen during edit mode or object mode. I also tried it with the viewport screen icon in the collections panel. My view is in viewport shading mode.
Maybe I mistyped a letter when using ctrl + r
Thanks for answering me, Martin!
I was able to solve it, I checked and unchecked the "exclude from view layer" box, after that they reappeared.
I will follow your recommendation to be able to see the references only in orthographic view.