Exceptions are suppressed when thrown by a zero-delay single-shot timer

from PySide6.QtCore import QTimer
from PySide6.QtWidgets import QApplication
from PySide6.QtWidgets import QPushButton
from PySide6.QtWidgets import QVBoxLayout
from PySide6.QtWidgets import QWidget

def fail():
    raise Exception("FAIL!")

app = QApplication()
b1 = QPushButton("FAIL now")
b1.clicked.connect(fail)
b2 = QPushButton("FAIL soon")
b2.clicked.connect(lambda: QTimer.singleShot(0, fail))
b3 = QPushButton("FAIL later")
b3.clicked.connect(lambda: QTimer.singleShot(1, fail))

widget = QWidget()
layout = QVBoxLayout(widget)
layout.addWidget(b1)
layout.addWidget(b2)
layout.addWidget(b3)

widget.show()
app.exec()

Traceback (most recent call last):
  File "c:\_WIP_\exceptions.py", line 8, in fail
    raise Exception("FAIL!")
Exception: FAIL!

Traceback (most recent call last):
  File "c:\_WIP_\exceptions.py", line 8, in fail
    raise Exception("FAIL!")
Exception: FAIL!
c:\_WIP_\exceptions.py:14: RuntimeWarning: libshiboken: Overflow: Value 0 exceeds limits of type  [signed] "int" (4bytes).
  b2.clicked.connect(lambda: QTimer.singleShot(0, fail))
Traceback (most recent call last):
  File "c:\_WIP_\exceptions.py", line 14, in <lambda>
    b2.clicked.connect(lambda: QTimer.singleShot(0, fail))
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^
OverflowError