Mac Mail adds iCloud to some Favourites
(This only happens on my M1 MacBook Air, not on my M2 Mac mini.)
In Mac Mail, I like to keep the sidebar closed and instead use the Favourites bar.
On my Mac mini this works fine, but my MacBook Air adds - iCloud to some of the mailbox names, which spoils the readability and appearance of the Favourites bar. See them underlined in red on the attachment.
I simply drag the mailbox from the sidebar onto the Favourites bar... and I cannot work out why on one Mac Mail this works nicely, but not on the other.
Is there an explanation / fix?
All software is latest version.
MacBook Air 13″, macOS 14.2