From the above it appears rx.py is ending and since there's no suggestion of a keyboard interrupt the conclusion is it must be quitting due to some error.
Any messages in the stderr file?
Max
gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.11
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Found Rafael Micro R820T tuner
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Traceback (most recent call last):
File "./rx.py", line 873, in <module>
rx = rx_main()
File "./rx.py", line 796, in __init__
self.tb = p25_rx_block(self.options)
File "./rx.py", line 161, in __init__
gain = int(gain)
ValueError: invalid literal for int() with base 10: '37\xe2\x80\x99'