Kong 1.3.0 and JWT Validation


I was using kong 0.14.1 without any problem. The gateway was configured with a global JWT plugin and all the consumers did have a JWT credential with the correct configuration.
I recently decided to move to version 1.3.0, applied the same configuration and all my requests did fail with a 401 Unauthorized (the traffic is routed normally if I disable the JWT Plugin).
Then, I downgraded to version 1.2.2 and the exact same configuration was working normally. As I did not find a breaking change in 1.3.0 which could lead to this problem, I was wondering what could be the reason that the latest version does not seem to work anymore for this use case.

Any feed-back is more than welcome !