There is a bug with this that occurs when you attempt to add a tag or a filter an object that is being displayed inside of a filter. Here is a way to reproduce this:
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Tag the first entry 1 and add a comment of 1
Tag the second entry 2 and add a comment of 2
Then, filter on tag 2.
From the filter screen, attempt to modify entry 2 to say "modified" in the comment section
Once this is done, you'll notice that entry #1 was modified rather than entry number 2
There is a bug with this that occurs when you attempt to add a tag or a filter an object that is being displayed inside of a filter. Here is a way to reproduce this: