Archer C2600 - Wireless Issue

Hi,

Running lastest 18.06 Snapshot a get:

Mon Nov 12 21:10:21 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 WPA: pairwise key handshake completed (RSN)
Mon Nov 12 21:15:51 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 IEEE 802.11: disconnected due to excessive missing ACKs
Mon Nov 12 21:15:51 2018 daemon.notice hostapd: wlan1: AP-STA-DISCONNECTED xx:xx:xx:xx:5f:d4
Mon Nov 12 21:15:56 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 IEEE 802.11: authenticated
Mon Nov 12 21:15:56 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 IEEE 802.11: associated (aid 1)
Mon Nov 12 21:15:56 2018 daemon.notice hostapd: wlan1: AP-STA-CONNECTED xx:xx:xx:xx:5f:d4
Mon Nov 12 21:15:56 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 WPA: pairwise key handshake completed (RSN)
Mon Nov 12 21:17:31 2018 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:73:f3 IEEE 802.11: disconnected due to excessive missing ACKs
Mon Nov 12 21:17:31 2018 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED xx:xx:xx:xx:73:f3
Mon Nov 12 21:17:57 2018 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:73:f3 IEEE 802.11: authenticated
Mon Nov 12 21:17:57 2018 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:73:f3 IEEE 802.11: associated (aid 4)
Mon Nov 12 21:17:57 2018 daemon.notice hostapd: wlan0: AP-STA-CONNECTED xx:xx:xx:xx:73:f3
Mon Nov 12 21:17:57 2018 daemon.info hostapd: wlan0: STA xx:xx:xx:xx:73:f3 WPA: pairwise key handshake completed (RSN)
Mon Nov 12 21:23:10 2018 daemon.info hostapd: wlan1: STA xx:xx:xx:xx:5f:d4 IEEE 802.11: disconnected due to excessive missing ACKs

I get constant messages about connections/disconnections.
The wifi config is the same I had in my Archer C7 v2, and I never had this problem.

Any idea/advice about?

Thanks,