I don't see anything in the statute that would support that:

https://www.flsenate.gov/laws/statutes/2018/95.18

I asked Gemini specifically about the loophole you highlight, and why more people don't commit adverse possession on houses that are in probate. It came up with:

1) Probate usually takes far less than 7 years - in this news story, it was done in 3

2) The adverse possession claim will come up on any title search, which any probate attorney or real estate agent would likely do. From the article, it looks like this is what actually caught the cop here.

3) Usually heirs that want to keep the house will pay property taxes on it. This resets the clock, and they'll get notification that somebody has already paid the taxes on it when they try to do so.

For people who aren't paying property taxes, aren't actively checking on or maintaining the property, and aren't trying to sell it - those are exactly the cases that adverse possession laws are trying to solve. The state believes that it's better for people to actively maintain properties and pay taxes on them, and if you don't do that, you risk losing your claim on them.