Is there a rule against taking food through TSA security checkpoints?

Twice in the last six months, when I went through the TSA checkpoint at San Jose airport, the screening agents specifically checked that I didn't have any food in my bags. The first time, I asked the agent about it and he said that there was a new rule as of March(?) 2018 prohibiting any food from being brought through a security checkpoint - including (but not limited to) dry food and processed food like cookies, nuts, granola bars, or so on. The thing is, other people I talk to in other parts of the country have never heard of this rule, I can't find any documentation about it online, and when I flew from another airport in the northeast, they didn't mention anything about food.

So... is there actually a TSA rule against taking food through security? Or if not a general rule, is there something going on that's specific to San Jose?

If I'd only encountered it once, I could dismiss it as a fluke, but I've been told about this twice, from two different agents, several months apart, which makes it harder to dismiss.