Wireless but no IP Traffic

I am pulling my Hair out ! I have the following. RB411UAHR with Internet through a local Network on ether1 IP set to 192.168.1.50/24. On the onboard 2.4Ghz wlan1 I am running Hotspot with Userman on IP 10.50.5.1. This all works fine. On wlan2 I am running on 5Ghz in station Mode with IP 192.168.1.55 and want to connect to an AP-Bridge. This AP Bridge (tried already Groove A and also RB435G) is supposed to get its Internet from the Station and is setup as AP-Bridge Mode on wlan1 with IP 192.168.1.65. My Station connects immediately as I can see in the Log and also in the Registration Tab of the Wireless on the AP-Bridge and also on the Station. But I cannot get any network Traffic through this, the only thing that goes is a MAC Ping ! Later I want to connect another Station (SXT to this AP-Bridge to also get Internet from the first Station). As it is a private Network I want to keep everything in one sub-net ! Everything is RouterOS 5.5. Please somebody help as I am baffled.

From your description I assume you have bridged ether1 and wlan2.
This will not work!
station mode per specification only allows traffic from the connected device itself.
There is a lengthy explanation and work-arounds in the Wiki.

Thanks, Initially I had a bridge , but your Answer put me on the right Track.

use station-wds instead of station.