CAP-XL-AC trouble bandwidth

Hello all,
I need some help to understand a trouble with CAP-XL-AC new version (with ros 6.49, 6.48.5 or 6.48x)
Have you test this new CAP ? have you some problem to keep good connexion (bandwitdh). The driver PC is uptodate.
My configuration use RB30xx serie in capsman mode with 10 CAP XL AC.
i try to use 2Ghz only or 5ghz only, no success.
Try to changed channel, like this :

/caps-man channel
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled
name=2G tx-power=20
add band=5ghz-a/n/ac control-channel-width=20mhz extension-channel=Ce name=5G
tx-power=20

I test too, to force channel without success…
Try SSID in local forwarding mode.. no success.
Thanks for your feedback !
Have a good weekend

Sorry not familiar with capsman.
I would try the router with ONE CAPAC, without capsman first.
THen if that works start adding in the capsman programming for the one device until you get it right.
Then add the other 9

Personally I would have come to the forum first to ask about wifi devices to add to RB30XX.
I would have recommended TPLINK eap245 and no one here would have recommended capac or capacX either.

Create enable

Then you can configure channels after initial provisioning per CAP/radio.