Hey thanks for the feedback!
No the search feature is not intentionally limited. I have encountered it myself a few times. As far as I have seen it depends on the time of day due to how many people are using it.
Why it is limited way more than the actual content and media I don't know.
I probably have to add a few more twitter accounts to my instance to avoid this.
This will take a bit of time because these accounts have to wait a but before they can be used for the instance.
