I'm coding in Liquid for my theme in order to search given keyword from collection.description. The problem is that the collection.description which is written by richtext editor has unintended and this   doesn't work same as normal space. I've been struggling so hard to find any helpful information from Shopify Community, but I cannot make it.
Here's a simplified example to describe the problem. Let's say the collection.description is "<p>Hello my world</p>" (You can see the same result only if the object contains ):
It happens only if is added by richtext editor (or any Shopify's end). If you replace the collection.description with another String variable of same value, all cases above return TRUE as follows:
Because of this feature, I cannot use some Liquid filters with collection.description such as contains, replace and remove. Furthermore, this can happen not only with collection description, but also with product description, page content, and blog post.