Fully HaLow/Bluetooth. Cellular is on, but it never gets used. I have a PoE switch, so not using the injector. I can pop that in and remove the connection from the switch when I get a chance though.
Or just block the DC from internet if that’s easier.
Only difference I can tell, aside from a longer base station power down, my yarbo app updated from 3.18.2 to 3.18.3. So far its not displaying any of the problems I was experiencing before. My yarbo and charging pad were left on while my rtk base station was turned off for a full 24+ hours. My yarbo core was rebooted and unplugged several times during my troubleshooting and never resulted in a change. Literally had same diagnostics as you and gps issues exactly the same as you. I gave up and was sitting in customer supports hands for a few days till I randomly decided to plug my base station back in and…just started working. Did sun/warm weather heat up the base station and kill off some moisture or something? Idk. Im still stumped. Supports solution is sending my more antennas.
It very well could have been moisture infiltration inside the RTK antennas. However, the update may have also been a factor.
Very strange. This morning, I tried the exact same area that it couldn’t even start mowing yesterday. It’s running flawless (other than getting a little too close for comfort to the drainage ditch, but that’s my bad on mapping). Under and around trees, open areas, etc. all fine. Every place it stopped and was waiting for GPS yesterday, it went right through without a hiccup. For sure the RTK quality goes down a little under trees, but it never drops and picks right back up when in the open.
As an IT person, these are always the most FUN issues to deal with: the intermittent ones. I do have some 3rd party antennas on the way (the higher gain ones a few people have talked about in other posts), so we’ll see if those are the permanent fix.
Glad to hear your Yarbo is running normally again! If you notice any GPS issues going forward, please don’t hesitate to reach out — we’re always here to help.
I think the issue for both of us is that we didn’t actually do anything. Things just magically started working right. I know I haven’t gotten any updates in the last couple of days, and I’ve made no changes. It just worked great Saturday, Sunday was terrible, and today it’s great again.
Maybe your Yarbo is religious?
I specifically requested a non-Catholic robot! 
Since it worked Saturday, it’s definitely not Jewish.