@David-TP Hi David, I installed this 3.8.112 version, and tried to change the passwords, but the issue still remains. See the screenshots below.

@David-TP Hi David, thank you for the tip! Unfortunately it did not work... I removed and reinstalled the tp-link Deco app from my iPad, but the password restriction is still there. See screenshot...

Around one month ago I bought a set of tp-link Deco S7 mesh units, and installed them in my house using the same network name and password of an old repeaters from another brand. Setup was easy, and...