I just bought new RB133 with XR2 with Router 2.9.38 installed on it. I using this RB as AP-Bridge.
Problem is when its active cometimes my clients can connect to the AP but after several hours or minutes clients got disconnected and can`t read AP SSID at all, so i must do hard reset to my AP.
Then i`m trying to use wireless-legacy package and not wireless package, its normal about 12 hours now, so thereis any problem with 2.9.38 wireless package? or should i upgrade my MT to the newest one?
Thanks.

You have to try with the latest 2.9.46 version, if you will have any problems contact support with attached support output file and detailed description of the problem.

I have this same problem with the RB500 + XR2 running 2.9.46. I have 2 towers with the RB500 + SR2 running 2.9.41 with no problems. Going to try replacing the XR2 with a SR2 to see what happens. Reboots don't help me, it just seems to be a function of time.