rescan library without refresh

It may seem like an odd question, but a solution would be a big help.

Kodi is running on several machines here, but mainly on one windows computer and a raspberry pi. The library is on an old, slow, but reliable NAS, managing is done through a mysql database which serves for all kodi clients and it’s working great.
However: the music library is quite large, which isn’t a problem. But if I add just one or two albums, I have to rescan the whole library. Normally this is done in the background without any hazzle and it doesn’t bother me if it takes some time, but the known files are just recognized but kodi is doing nothing with it. But there is a problem with this specific NAS. As soon as daylight saving time begins or ends, it seems the files changed the last modified time. Therefore kodi is rescanning the files – ALL the files, not only the new ones. So this takes massive time, much more than bearable.

So, can I tell kodi to ignore all existing files (files that are already in the library) regardless any new time stamps? If I changed files and want a complete rescan, I would switch it off again. But I would really like to only collect new data into the library.

Version is currently 16.1, if this do matter.

Thx!