Some remarks / thoughts:
- "Connecting to port /dev/ttyACM0, baudrate 250000" have you tried lower rate? ex 115200
- do note the "Recv: Cap:THERMAL_PROTECTION:0" and warning in terminal.log
- "Did not receive parseable position data from printer within 10.0s, continuing without it" do you know how long the command queue is? M114 seems to work, just not fast enough.. (try baud-rate first...)