Preview Level always back to 0dB

Usually turn the preview level half down when I import audio, but it very often back to 0dB after I imported and while editing. Sometimes it happen after import several times, sometimes happen quickly. I have to adjust level about 50-100 times a day ( I’m sound effect editor ).
So. I always show the File Browser on the right side to make sure the level is no too loud before import audio.

Some of my co-worker doesn’t have this issue, but some does.
Is there anything I’m doing wrong cause this happened?

Nuendo 10.3.1, happens on both Windows 10 and OSX 10.14.6