Interface blue0 deleted

Hello folks,

In the evening, shortly after 11:35 p.m., my internet goes away. The following is written in the log below:

23:36:22 charon: 10[KNL] interface blue0 deactivated
23:36:22 charon: 12[KNL] disappeared from blue0
23:36:22 charon: 15[KNL] interface blue0 deleted

I only have IPsec (re)start at this time in the connection scheduler.
The blue interface doesn’t come back…do you have an idea?