The add-on gets caught out by some web pages using time indicators with AM or PM choices. If the default time indicator is PM, and you want AM, you can't change it, the setting reverts once focus has moved. Similarly if the default time indicator is AM, and you want PM, same problem. First started to notice this when trying to set a reminder for my Amazon Eco device. I was unable to change the AM/PM time and make it permanent unless I disable the add-on from working. A minor issue I'm sure will be easily corrected.