Periodic Loss of the Bookmark "Star" in the Address Window

[RBTB2605]

This is not a big deal for me, but I do periodically lose the bookmark star symbol in the address bar and was wondering is anyone else sees the same behavior ? Bookmarks are a big deal to me and the past couple of days I have been sorting through and cleaning out and re-bookmarking some sites and this is why it has become more noticeable to me that the star has been disappearing. I know that I can right click on a page to add it to my bookmarks also.