Can't open boot with engine running

[joey1211]

I've been taking my mum's Twingo out for runs as it's not being used much and noticed that the boot wont open via the keyfob with the engine running.

Is this standard on this car? Seems a bit of a faff. I can't find a physical button on the exterior to open it either.

 

[hairymonkey]

It’s where the number plate lights are