message: wifi:bcn_timeout,ap_probe_send_start

[accacca]

We develop new firmware using an ESP32-S3-WROOM-1.N8R8 kit
Our firmware use both the peripheral BT and wifi
We have used booth stacks Bluedroid and Nimble (Now we use Nimble)
With Wireless Coexistence enabled we receive in our debug log this messages:

wifi:bcn_timeout,ap_probe_send_start

every 15-20s indifferently from the bluetooth stack used
Now we have disabled the Wireless Coexsistence and the message disappeared from the debug log

can anyone explain this behavior? should we investigate further ?
grazie

ESP IDF 5.1.0 - VSC ide - Windows 10 environment