If you’re experiencing difficulty tapping a username or hashtag, try some of our troubleshooting tips
I can’t double tap to like or click on a hashtag or username
On Apple iOS, these features are only supported when running iOS 4.0 or later. On Android, these features are supported on all phones and tablets.
You can search by hashtag or username by tapping 
Search & Explore > Search.
Why can’t I search for certain hashtags?
Hashtags on Instagram may not be searchable if they’re consistently associated with content that doesn’t follow our Terms of Use or Community Guidelines.
We review these hashtags periodically and may make the hashtag searchable again if the content associated with particular hashtags changes over time. We encourage people to report inappropriate hashtags by using our built-in reporting.
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