I would lower the temperature to 375. Check to see if it is finished baking after 25 minutes. It will likely take closer to 30 minutes. I use a thermometer with a baking probe, the type used to test meat. When the internal temperature is between 195 and 205 bread is finished baking. You can also use the tap on the bottom method. It will sound hollow when thumped when finished.
Thank you so much for your help as always

I have an instant read thermometer that I can use, I'll give it a try.