HLS encryption VOD randomly stop playing on IOS

We have 4 AMS servers load balanced (DNS) with identical application on each. RTMPe is playing fine from flash desktops, however, HLSe on IOS devices randomly stops playing part way through the content. I do not see any relevant errors in AMS/Apache. The front end player shows the following errors when the content stops playing:

"CoreMediaErrorDomain" "No response for media file in 0.49632s"

"CoreMediaErrorDomain" "Segment exceeds specified bandwidth for variant"

Similar issues discussed here: http://openradar.io/15060374 (thought not AMS specific).

This could be a player issue. It seems to randomly have issues grabbing an HLS segment. Has anyone else had any similar issues?

(the following IP's, certs, URL's have been replaced for privacy).

httpd.conf

<Location /hls-vod>

                HLSHttpStreamingEnabled true

                HLSMediaFileDuration 8000

                HttpStreamingContentPath "/mnt/store0/"

                HLSFmsDirPath ".."

                HLSJITConfAllowed true

                ########################################

                # Cache-control header configuration start

                # Specify the max-age(in secs) to set in the Cache-Control header

                # for different response types (m3u8, ts, drmmeta,...).

                # A value of -1 turns off setting the cache control header.

                HLSM3U8MaxAge 86400

                HLSTSSegmentMaxAge 86400

                HLSMetaMaxAge 3600

                # Cache-control header configuration end

                ########################################

                # Uncomment the following directives to enable encryption

                # for this location.

                     HLSEncryptionScope server

                     HLSEncryptCipherKeyFile "../creds/vodkey.bin"

                     HLSEncryptKeyURI        "https://myurl/hls-key/vodkey.bin"

                Options -Indexes FollowSymLinks

        </Location>

httpd-hls-secure.conf

<VirtualHost myip:443>

ServerName myserver

DocumentRoot "../webroot"

SSLEngine on

SSLCertificateFile    "/opt/certs/mycert.crt"

#Uncomment the following if the file specified above does not

#have the private key

SSLCertificateKeyFile "/opt/certs/mykey.key"

#Client Authentication configuration

#SSLVerifyClient require

#SSLVerifyDepth       9

SSLCACertificateFile "/opt/certs/myintermediate.crt"

SSLOptions           +StdEnvVars +FakeBasicAuth -ExportCertData +StrictRequire

<Location /hls-key>

  HLSEncryptHostCipherKey true

  HLSFmsDirPath ".."

  HLSEncryptKeyRepository "../creds"

  SSLRequireSSL

#  SSLRequire %{SSL_CLIENT_S_DN_CN} eq "iPhoneOS Device Certificate"

</Location>

</VirtualHost>