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DS90UB925Q-Q1: TMUX136MRSER TS3USB3000

Part Number: DS90UB925Q-Q1
Other Parts Discussed in Thread: TS3USB3000

Well, hello!

    we are using FPD-LINK DS90UB925 and DS90UB926 to deliver video over 15 meters via Coaxial;

and if longer than 10 meters there needed an repeater; 

and the repeater we have maded it out and works correctly!

    But! when we put this network into the bus, the workers often install the repeater in a wrong direction.

So we need to added an "auto-direction" circuit to correct this fault in the repeater . the circuit as below:

When we dected it is wrong direction, we use this MUX to exchange the TX and RX .

This circuit works, but is it very unstable. the video getting flicking, and  the LOCK signal becomes a random pulse.

We have tried TMUX136MRSER too, it is all the same.

      Is thers anything wrong in my design?