Saving using 'label' icon on post and going back and clicking save unsaved the article

[YJDoc2]

Describe the bug
Using mobile version,
When one clicks label icon to save the post, and goes back to home page by back button on mobile , the 'save' button on the post is still there, which is probably as the browser caches the page, and is expected, but clicking on the save button changes it 'saved' while actually unsaving the article from reading list. One more click keeps the 'saved' but saves the article again, and clicking again changes the button to 'unsave' clicking on which removes it from saved articles and changes the button to 'save' again

To Reproduce

1. On mobile, open side panel and note number of saved articles
2. Go to any article
3. Save article by clicking on label icon in bottom, which ia along with heart and unicorn
4. Click on back button on mobile
5. Check the saved articles, by opening sidebar, it should be increased by one (closing the side bar makes the article list weirdly jump upward, not sure if it's another bug or intended)
6. The button on article should still be saying save
7. Click the save button, it should change it to saved , but the number of saved articles will now return to original

Expected behavior
Even though clicking back would display save button only, (probably due to browser caching the page) clicking on it should not unsave the article, just change the button to say saved.

Smartphone (please complete the following information):

• Android 10:
• Chrome 86.0:

[github-actions]

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[YJDoc2]

I do not have much experience developing Ruby applications, but if someone can point to a possible starting point, I'd like to try and solve this.
As much as I have understood till now, a possible starting point would be to look in /app/javascript/articles/Feed.jsx, and have been trying to find out more.