M900: HttpPostHeldTask: TIMEOUT

We set up M900 with two DECT devices and are using a Cloud PBX service provider. Once discovering syslog (debug state), there are lots of timeout entries. What do they mean?

Some entries:

loc6 .Debug 2022-07-28T19:51:02.410Z 236 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc0 .Debug 2022-07-28T19:51:03.960Z 236 [ DECT: Handsets locked on base, nr 2 00002 00001 ]
loc6 .Debug 2022-07-28T19:51:22.410Z 236 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc6 .Debug 2022-07-28T19:51:42.410Z 236 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc6 .Debug 2022-07-28T19:52:02.410Z 236 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc0 .Debug 2022-07-28T19:52:03.960Z 236 [ DECT: Handsets locked on base, nr 2 00002 00001 ]
loc6 .Debug 2022-07-28T19:52:22.410Z 237 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc6 .Debug 2022-07-28T19:52:42.410Z 237 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc6 .Debug 2022-07-28T19:53:02.410Z 237 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc0 .Debug 2022-07-28T19:53:03.960Z 237 [ DECT: Handsets locked on base, nr 2 00002 00001 ]
loc6 .Debug 2022-07-28T19:53:22.410Z 238 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc6 .Debug 2022-07-28T19:53:42.410Z 238 [ HttpPostHeldTask: TIMEOUT handled in State:HTTP_POST_HELD_STATE_STARTING_UP ]
loc0 .Debug 2022-07-28T19:54:01.380Z 238 [ DECT: PP_MAC_UP_IND Pmid:00002, IPEI:0328D7C132, LockedRfpi:1399171A00 ]
loc0 .Debug 2022-07-28T19:54:01.380Z 238 [ RSSI -66 dBm, Cnt 126, FP List: FFFF 112, FFFF 112 ]