wrapped C/C++ object of type QThread has been deleted

I encountered this crash with v0.19.1:

DEBUG:urllib3.connectionpool:https://g1.data.e-is.pro:443 "GET /g1/block/0/_source HTTP/1.1" 200 0
DEBUG:root:Dispatch Event ConnectionsEvent(type='ConnectionsEvent.indexer_connected')
DEBUG:root:Run Event listener <bound method MainWindow._on_indexer_connected of <tikka.slots.pyqt.windows.main.MainWindow object at 0x7f363c3ee7b0>>
DEBUG:root:Run Event listener <bound method ConnectionWidget._on_indexer_connected of <tikka.slots.pyqt.widgets.connection.ConnectionWidget object at 0x7f363bb440e0>>
DEBUG:root:Run Event listener <function ServersWidget.__init__.<locals>.<lambda> at 0x7f363c3e1dd0>
DEBUG:urllib3.connectionpool:https://g1.data.e-is.pro:443 "GET /g1/block/current/_source HTTP/1.1" 200 0
Traceback (most recent call last):
  File "/home/moul/.local/pipx/venvs/tikka/lib64/python3.14/site-packages/tikka/slots/pyqt/windows/main.py", line 455, in on_window_shown
    self.async_connect_to_servers()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/moul/.local/pipx/venvs/tikka/lib64/python3.14/site-packages/tikka/slots/pyqt/windows/main.py", line 1323, in async_connect_to_servers
    self.connection_thread.start()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
RuntimeError: wrapped C/C++ object of type QThread has been deleted
fish: Job 1, 'tikka' terminated by signal SIGABRT (Abort)

I don’t know how did it happen. I don’t know how to reproduce it.