Fix keepalive race condition (#9140)

[Dreamsorcerer]

(cherry picked from commit 37e3aa4)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.78%. Comparing base (839d060) to head (2b7a204).
Report is 170 commits behind head on 3.10.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.10    #9143   +/-   ##
=======================================
  Coverage   97.77%   97.78%           
=======================================
  Files         108      108           
  Lines       34500    34528   +28     
  Branches     4112     4116    +4     
=======================================
+ Hits        33733    33762   +29     
  Misses        572      572           
+ Partials      195      194    -1     

Flag	Coverage Δ
CI-GHA	97.67% <100.00%> (+<0.01%)	⬆️
OS-Linux	97.35% <100.00%> (-0.01%)	⬇️
OS-Windows	94.93% <100.00%> (+<0.01%)	⬆️
OS-macOS	97.04% <100.00%> (-0.01%)	⬇️
Py-3.10.11	97.13% <100.00%> (+<0.01%)	⬆️
Py-3.10.14	97.06% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	97.30% <100.00%> (+<0.01%)	⬆️
Py-3.12.5	97.37% <100.00%> (-0.03%)	⬇️
Py-3.12.6	96.82% <100.00%> (?)
Py-3.8.10	94.55% <100.00%> (+<0.01%)	⬆️
Py-3.8.18	96.85% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	97.03% <100.00%> (+<0.01%)	⬆️
Py-3.9.19	96.97% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	96.57% <100.00%> (+<0.01%)	⬆️
VM-macos	97.04% <100.00%> (-0.01%)	⬇️
VM-ubuntu	97.35% <100.00%> (-0.01%)	⬇️
VM-windows	94.93% <100.00%> (+<0.01%)	⬆️

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