2021 RAV4 Window switch

[AJB0009]

2021 Toyota RAV-4 XLE
All windows work fine from driver's control; both manual up/down (1st-click) and auto up/down (2nd click).
Three doors work fine from their respective switches.
The left rear door works auto up/down from its switch, but neither manual up nor down will work.
The child lock button at the driver door is off.
Thoughts or suggestions of what may be wrong?
TIA

 

[2009Caraman]

can you swap with right rear to verify its the switch not wiring?

 

[Leo99]

Any chance someone spilled something in there? I'd spray with some contact cleaner.

 

[AJB0009]

Update: I did as @2009Caraman suggested and removed the two rear door switches and tried my faulty switch on the other side. I just took the whole assembly: The switch in its holder, which is in the trim piece that comes out of the door panel. At first, it worked, then it stopped. Long story short, I looked at it and found it is broke (slightly) in two places. So, the switch moves around a bit in its holder. If you hold it tight in your hand, it works fine.
I will order a new switch and should be good to go.
I do not see any marks on the outside or any evidence of it being hit. I wonder if it was broke during assembly and no one ever noticed? My son just happened to be back there several weeks ago and tried to roll the window down and noticed it.
Who knows.
Thank you!