This would likely be a security enhancement, allowing the user to choose which devices are always automatically re-connected (Always accept) and those that are never allowed to re-connect (Deny). A provision for one time connection (Accept) is made too.
Reconnecting devices
Starting with MX Linux 25 Xfce a 'Bluetooth Authentication' popup appears when you power on a previously connected Bluetooth device when in range. FYI - Pairing and Trust are persistent on Linux installations. If you choose 'Always Accept' the device will finish connecting on its own for the next power on.

(Blueman 2.4.4)
Above is what was added as a recent edit of my
Bluetooth devices How-To PDF, updated September 25, 2025.
Michael O'Toole
MX Linux facebook group moderator
Dell OptiPlex 7050 i7-7700, MX Linux 23 Xfce & Win 11 Pro
HP Pavilion P2-1394 i3-2120T, MX Linux 23 Xfce & Win 10 Home
Dell Inspiron N7010 Intel Core i5 M 460, MX Linux 23 Xfce & KDE, Win 10