"Re-starting finished log context" due to RetryDestinationLimiter

[squahtx]

RetryDestinationLimiter.__exit__ stores retry timings in a background process:

synapse/synapse/util/retryutils.py

Lines 267 to 268 in 8dd3e0e

	# we deliberately do this in the background.
	synapse.logging.context.run_in_background(store_retry_timings)

store_retry_timings inherits the current logcontext, which likely comes from a with LogContext(): ... further up the stack.
But there's no guarantee that store_retry_timings will finish before we exit that context manager further up the stack.