i can't connect to my device sd_ble_gatts_exchange_mtu_reply error 8

[vea45]

Hi,

I have an nrf52 with sd 132 3.0.0 and SDK 12.2 which after turning it on I can connect to it without problems, but after some time (maybe 10-15 minutes) I can't connect to it again the connection drops before it can be established. I'm debugging the board and I get an error 8 at this function "sd_ble_gatts_exchange_mtu_reply" when the BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST is called during the connection...

Any ideas?

[run_ar]

So you are getting a nrf_error_invalid_state: Invalid Connection State or no ATT_MTU exchange request pending.

Do you have a sniffer trace showing what happens on air in this case? Is the connection still alive when you try to reply to the ATT MTU request? Which central device are you testing against?