Yes.
This is caused by uplink/downlink signal INTERRUPTIONS and is typical for VSC drones (drones that use the DJI Fly app).
It has NOTHING to do with obstacle avoidance sensors.
The signal strength display is just an average and at 60% there are most likely a lot of interruptions causing this average.
Building UFF-Bloco F (Faculdade de Economia), a 5-story (about 20m high) building is half way between the Home Point and the drone. The drone flies at an altitude of 40m. Half way is about 20m. When this building is indeed about 20m high, it will block the signal.
Have a look at this topic: