Unexpected path length 4 for exit circuit X, purpose 5

Hello bridge operators,

I have recently upgraded the tor version 0.4.7.7 of 3 bridges Im hosting. On all of them, I have some notice logs saying :

13:10:55 [NOTICE] Unexpected path length 4 for exit circuit 1008, purpose 5
11:39:55 [NOTICE] Unexpected path length 4 for exit circuit 979, purpose 5
10:08:55 [NOTICE] Unexpected path length 4 for exit circuit 957, purpose 5

Where the exit circuit increases more and more. On my other bridges, I don’t have this problem. These logs appear from time to time…

Do you also have this on your bridges ?
Thanks for your help

Yep, I have alike messages for one of my bridges.