Problems, Crashes and Errors of Hashtags For Likes TODAY

If you add hashtags that don't follow the community guidelines, your post might not do well.
Check if the words or hashtags you want to use are allowed on Instagram before adding them.
And adding banned hashtags might be one of the reasons why Instagram hashtags aren't working properly for you.

There may be multiple reasons for Instagram crashing, from running on an outdated version of the app, or not having updated your Android or iOS device to the latest version, to third-party app intervention and more.

For example, if a hashtag is used too frequently in a short duration of time, like #happythanksgiving, Instagram presumes it as spam content and bans it.
Instagram might also ban what seem like totally normal hashtags in order to track down fake accounts and give its users a better experience.

You should probably know that Instagram allows only 30 hashtags per post.
That being said, if you're overusing or abusing them, you could be temporarily banned.
Therefore, people don't even get to see your post, and that might explain why you're not getting any likes through hashtags anymore.