Non-fatal assertion circ->purpose != CIRCUIT_PURPOSE_CONFLUX_LINKED failed

same as mentionedd here by HELLRAiSER555: https://forum.torproject.org/t/stable-release-0-4-8-16/18062/4

some of my log:

[warn] tor_bug_occurred_(): Bug: ../src/core/or/conflux_util.h:31: CIRCUIT_IS_CONFLUX: Non-fatal assertion circ->purpose != CIRCUIT_PURPOSE_CONFLUX_LINKED failed. (on Tor 0.4.8.15 ) [warn] Bug: Tor 0.4.8.15: Non-fatal assertion circ->purpose != CIRCUIT_PURPOSE_CONFLUX_LINKED failed in CIRCUIT_IS_CONFLUX at ../src/core/or/conflux_util.h:31. Stack trace: (on Tor 0.4.8.15 )

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