Not really. In DC land gaps are freaking everywhere and there are regular gapping incidents. On AC I've never heard of a unit being gapped in a neutral section. I'm sure its happened I just can't recall any.
Neutral sections are usually well placed and not at places where you bring your unit to a stand and they are usually placed on a gradient so you can gravitate out. Its our first instruction for neutral sections.
On DC I worry about gapping, on AC I rarely, if at all, think about it.
There was a 4-car class 350 gapped near Berkswell a couple of years ago (either Jan or Feb of 2014 or 2015, I think). The train had started from a stand at Berkswell heading up towards Coventry / London - the gentle climb up from Berkswell towards Beechwood tunnel didn't help, as rolling out of the neutral section would have entailed rolling backwards.
I vaguely recall (not sure on the details) there being some kind of temporary speed restriction, which meant the driver wouldn't have been carrying enough speed and got caught out. In the end another 350 had to come and rescue it.
To be honest with the neutral section so close to Berkswell station I'm surprised it doesn't happen there more often.