@bsudabathula Ok, that is definitely weird. Are you for sure using the same host, and Message VPN, and username? ACL profiles are tied to usernames, and are VPN specific, so (I hope) both of your tests are using the same login information.
As far as I know, you should never see an ACL publish exception unless the ACL profile associated with the username is specifically configured as such.
Please go into the PubSub+ Manager (host:8080), click on the VPN name → Access Control → ACL Profiles → choose yours → Publish Topic, and screenshot it please.
Or, if you have access to CLI:
show client-username <blah> detail
(look for the ACL profile used by your username)
show acl-profile <blah-acl> detail
Also, if you have access to CLI, can you show me:
show log acl publish-topic
After you get the error in your client app.
Thanks!