log szerint mégis lesz itt valami a protforward-dal, pedig a 2 verzió között semmi beállításbeli különbséget nem csináltam.
Először 2.93-ast indítottam, majd 3.0 install után azt, az azonos srokat töröltem.

TM 2.93 start:

[2023-02-12 09:33:46.104] Port Forwarding (NAT-PMP) initnatpmp succeeded (0) (natpmp.c:70)
[2023-02-12 09:33:46.104] Port Forwarding (NAT-PMP) sendpublicaddressrequest succeeded (2) (natpmp.c:70)
[2023-02-12 09:33:48.122] Port Forwarding Starting (port-forwarding.c:92)
[2023-02-12 09:33:53.122] Port Forwarding Starting (port-forwarding.c:92)
[2023-02-12 09:34:56.324] Saved "/i-data/2b9544ef/.PKG/ffp/ffproot/ffp/tm/.transmission-daemon/settings.json" (variant.c:1266)

TM 3.0 start:

[2023-02-12 09:35:32.024] Port Forwarding (NAT-PMP) initnatpmp succeeded (0) (natpmp.c:73)
[2023-02-12 09:35:32.024] Port Forwarding (NAT-PMP) sendpublicaddressrequest succeeded (2) (natpmp.c:73)
[2023-02-12 09:35:34.040] Port Forwarding State changed from "Not forwarded" to "Starting" (port-forwarding.c:107)
[2023-02-12 09:35:34.041] Unable to create session lock file (38): Function not implemented (session-id.c:96)
[2023-02-12 09:35:40.045] Port Forwarding State changed from "Starting" to "???" (port-forwarding.c:107)
[2023-02-12 09:37:31.243] Saved "/i-data/2b9544ef/.PKG/ffp/ffproot/ffp/tm/.transmission-daemon/settings.json" (variant.c:1226)