yes, it worked for me. As I mentioned in some post, the first time I copied some files from the original NVD_IMEI folder that were missing after the deletion and reconstruction (in my case were NV0S_000, NV01A000 and NV01B000) and the mini signal losses were fixed.
But much time later I did everything again, because from time to time, maybe every couple of months, I would lose my IMEI again, and just deleted NVD_IMEI, didn't change permissions, copy files or anything, and it's working fine, no mini signal losses.
I think the difference is I updated magisk to the latest version before I did that procedure again. Maybe try that. Update magisk, delete NVD_IMEI again, don't touch permissions.
If that doesn't work, make and receive some calls and SMS (because the system will create some new files), then try copying the files from your original backup that are missing now (the three I mentioned). Although maybe after some use, they eventually get created (?).
And if that doesn't work, or you wanna experiment to try to prevent the IMEI loss from happening again, you can try to make the file IP03_001 read-only (# chmod 440 IP03_001), because I've seen that file gets modified right before an IMEI loss.