Answer
Not a bug
did you check the after sunset box?
Thu, 23 July 2026 = 9th of Av, 5786
https://www.hebcal.com/converter?gd=23&gm=7&gy=2026&g2h=1
Thu, 23 July 2026 after sunset = 10th of Av, 5786
https://www.hebcal.com/converter?gd=23&gm=7&gy=2026&gs=on&g2h=1
Customer support service by UserEcho
did you check the after sunset box?
Thu, 23 July 2026 = 9th of Av, 5786
https://www.hebcal.com/converter?gd=23&gm=7&gy=2026&g2h=1
Thu, 23 July 2026 after sunset = 10th of Av, 5786
https://www.hebcal.com/converter?gd=23&gm=7&gy=2026&gs=on&g2h=1