I've been mostly very happy with #tuta @Tutanota mail since switching to it a few months ago but it seems to have developed the habit of deleting all my saved contacts every few days

I have contacts synchronization enabled

I use the iOS client (on 2 devices) and the web client (on 2 other devices)

Now switching my web client usage over to the windows client to see if it encourages it to stop deleting my contacts...!