Power reporting

Just starting with Meshtastic so maybe this is documented somewhere and I didn’t find it…

I have two T-Echo units - one with a BME280 and one without. I also have a couple T-Beam v1.1 units. In the Android app (from the Google Play Store), the one T-Echo with the BME280 has a battery symbol and percentage listed. The other T-Echo and all the T-Beam units show a plug icon presumably meaning they think they are plugged into power instead of running on batteries. (They are all battery powered.)

Bug in the 1.2.65 firmware or am I missing something?

I have the T-Beams with the M8N and SX1262 as well as the V1.1 T-Beams and all those display the plug icon as well when they are running off of battery.