FreeBSD-main-amd64-test - Build #24862 - Still Unstable

FreeBSD-main-amd64-test - Build #24862 (5e248c23d995a059d24f4784d5a256cddd42e557) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24862/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24862/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24862/console

Status explanation:
"Unstable" - some tests are suspected being broken by the following changes
"Still Unstable" - the failing test cases have not been fixed by these
                   following changes and this is a notification to note that
                   these changes have not been fully tested by the CI system

Change summaries:
(Those commits are likely but not certainly responsible)

38983d40c18ec5705dcba19ac320b86c5efe8e7e by rscheff:
tcp: prevent div by zero in cc_htcp

f74352fbcf15341accaf5a92240871f98323215d by rscheff:
tcp: use enum for all congestion control signals

40fdc6d25f01eea7767f1ba21efcde0e8e26b5eb by rscheff:
tcp: provide correct snd_fack on post_recovery

038699a8f18a0a651ee06b85fa1dbbee1eab56f1 by rscheff:
tcp: cubic - restart epoch after RTO

644cffe67f61ad5b36b60d621d1c630ff2a50412 by tuexen:
sctp: improve sending of packets containing an INIT ACK chunk

5e248c23d995a059d24f4784d5a256cddd42e557 by rscheff:
tcp: retain some CC signals outside of kernel scope



The failed test cases:

1 tests failed.
FAILED:  sys.kern.ptrace_test.ptrace__follow_fork_both_attached_unrelated_debugger

Error Message:
/usr/src/tests/sys/kern/ptrace_test.c:591: WIFSTOPPED(status) not met