Tailgate latch issue

[Ghost-Who-Walks]

I know there's been a few threads on this already - I've had a look, and my symptoms seem slightly different (although maybe the cause is the same??!)...

I was using my car around the house (moving trailer) last weekend. The tailgate latch started actuating (on it's own) repeatedly.
It did this many (50-100) times over the course of a few hours, whilst the car was running and turned off (ignition off).
When I closed the tailgate and then tried to unlatch it, the latch was unresponsive a few times, but I was eventually able to open it.
When I locked the car, it did not do it (repeated unlatching).

Maybe related - I had a low battery warning on my remote, and I put a new battery in straight away. The unprovoked unlatching happened 1-2 days after this, so the remote should have been fine.

I locked the car up, and it hasn't happened since. I used it once yesterday (first use since last weekend), and there was no evidence of the auto-unlatching that had occurred.

Is this evidence of a failing latch? I feel like it may be more to do with my remote or some other signal issue...

Any ideas?

Fault code from IID tool:

163160
Thanks (in advance!).

[Eric SDV6SE]

It could well be the microswitch in the upper door handle sticking, gently prise it out and give it a clean with contact cleaner. At least the actuator got a hood workout...