When I go to my blog page and click on one of the topics from the table of contents. Note the table of contents is made by using a plug in that takes all the element and make the toc. https://www.scrapingdog.com/blog/csharp-html-parser/
Now after that if I click on back button on browser, it shows 400 error which vanishes if I reload. This problem only exists if I keep my permalinks option to "Postname". Once I change it to "Month and name" it works completely fine. What should I do keep using post name permalink and the page also keep on working.