New certificate are not visible from all client

Hello,
Yesterday, I installed a new SSL certicate on our kong cluster with a PATCH to admin api and all was fine.
On my PC, a curl command return “SSL certificate verify ok”.

But, today, some issue have been reported to me : I try the same command on another client and i have SSL certificate problem: “certificate has expired”. On this PC, the command echo -n | openssl s_client -connect api.xxxxx.xx:443 | openssl x509 -outform PEM return the Kong autosigned certificate :

depth=0 C = US, ST = California, L = San Francisco, O = Kong, OU = IT Department, CN = localhost
verify error:num=18:self signed certificate
verify return:1
depth=0 C = US, ST = California, L = San Francisco, O = Kong, OU = IT Department, CN = localhost
verify error:num=10:certificate has expired
notAfter=Jun 13 14:28:37 2019 GMT
verify return:1
depth=0 C = US, ST = California, L = San Francisco, O = Kong, OU = IT Department, CN = localhost
notAfter=Jun 13 14:28:37 2019 GMT
verify return:1

Do you have an idea ?

Thanks