It could be that you are losing some followers because I am not sure which relays are reading relay.nostr.band, according to its author all, but I don't know what is "all".

In the case of nostr.mutinywallet.com if I can assure you that writes in hundreds of relays because I have reviewed the code and reads the list of relays online nostr.watch.

However, I think it is worth losing a few followers for the bandwidth and battery savings it produces.