Nest 3rd generation thermostat delaying

Seeing if anyone is having or had this problem with their Nest thermostat. I purchased the 3rd generation Nest thermostat in June and haven’t had any problems with cooling my house. Using the heater for the first time this year and it heats for 2 minutes then goes into delay mode for 3 minutes or so. I checked the reddit threads and a lot of people claims changing the filter solves the problem, but I just changed it on November 1. This constant off/on can’t be good for the heater and my house is not getting any warmer. Any tips?

On a side note, never did see any savings the last 4 months. In fact, my electricity bill was about $25 more compared to the same months last year. Thinking about going back to the old thermostat that was installed when we first moved.