I’m seeing the following errors in Apache error.log today (first was around 7:05 UTC):
[Mon Dec 12 09:05:48.924279 2016] [ssl:error] [pid 14655:tid 2921329712] AH01936: stapling_check_response: response times invalid
[Mon Dec 12 09:05:48.924639 2016] [ssl:error] [pid 14655:tid 2921329712] AH01943: stapling_renew_response: error in retrieved response!
Otherwise my website loads fine in both Firefox 50.0.2 and Chrome 55.0.2883.75. It seems my Apache does not send invalid OCSP responses to clients:
$ openssl s_client -connect ... -status -tlsextdebug|grep OCSP
OCSP response: no response sent
I use Apache 2.4.10-10+deb8u7, OpenSSL 1.0.1t-1+deb8u5 (Debian Jessie).