It should be there, if it was successfully added. Note that Direct messaging topic subscriptions only last as long as the client is connected. Topics are not configured objects in Solace… they are just metadata sent along with the messages.
Just double-checking something… are you using the default client-username for your default VPN? By default, there’s a toggle inside the Client Profile (located under “Access Control” to allow for shared subscriptions (which you appear to be using), that needs to be toggled. I’m assuming it is.
I think we’re going to need either some code or more detailed steps on how to reproduce. The broker (and client) doesn’t look like it’s anywhere near it’s maximum number of subscriptions.
BTW… your topic… I’d suggest using a level-separator of / to make use of Solace topic hierarchies. So: horse/race/frame … that way you can subscribe to horse/> to receive all horse messages… or horse/race/> to receive all horse racing messages.