Availability widget acting weird with 'Date range with time' rules

[Valentina R]

I have created 2 products that have standard settings and one availability rule:

Availability widget with ?min_date=2020-09-18&max_date=2020-09-20 shows both products. But when changing to ?min_date=2020-09-17&max_date=2020-09-20, none of the two products show up.

Reported here.

[Željan Topić]

Fixed with 4.9.11