and here are the coolwsd service log: hastebin
avril 01 10:11:07 coolwsd[617951]: wsd-617951-617951 2026-04-01 10:10:47.346804 +0200 [ coolwsd ] INF Waiting for a new child for a max of 20000ms| wsd/COOLWSD.cpp:3771
avril 01 10:11:07 coolwsd[617951]: wsd-617951-617951 2026-04-01 10:11:07.347139 +0200 [ coolwsd ] INF Waiting for a new child for a max of 20000ms| wsd/COOLWSD.cpp:3771
avril 01 10:11:11 coolwsd[617951]: wsd-617951-617956 2026-04-01 10:10:07.872821 +0200 [ prisoner_poll ] TRC #15: Handling poll events of prisoner_poll at index 0 (of 1): 0x0| net/Socket.cpp:705
avril 01 10:11:11 coolwsd[617951]: wsd-617951-617956 2026-04-01 10:10:07.872846 +0200 [ prisoner_poll ] TRC #15: setupPollFds getPollEvents: 0x1| net/Socket.hpp:1106
avril 01 10:11:11 coolwsd[617951]: wsd-617951-617956 2026-04-01 10:10:07.872862 +0200 [ prisoner_poll ] TRC ppoll start, timeoutMicroS: 64000000 size 1| net/Socket.cpp:534
avril 01 10:11:11 coolwsd[617951]: wsd-617951-617956 2026-04-01 10:11:11.926339 +0200 [ prisoner_poll ] TRC Poll completed with 0 live polls max (64000000us)(timedout)| net/Socket.cpp:552
avril 01 10:11:47 coolwsd[617951]: wsd-617951-617951 2026-04-01 10:11:27.347527 +0200 [ coolwsd ] INF Waiting for a new child for a max of 20000ms| wsd/COOLWSD.cpp:3771
avril 01 10:11:47 coolwsd[617951]: wsd-617951-617951 2026-04-01 10:11:47.347880 +0200 [ coolwsd ] INF Waiting for a new child for a max of 20000ms| wsd/COOLWSD.cpp:3771