I also use Shimano for my open face reels. I have several Zebcos including Omega but I only put fluro or mono in those as the crystal fireline/braid doesn't work as well. I use crystal fireline/braid for a couple of my open face reels I like the line has no give and easier to pull snags out of trees with that line.
I was having issues with the braided line on my spinner reels. I wasn't able to get it to grip onto the reel for most of the morning. Once the line got wet and was wound a few times it got better, but was never perfect. Is there something I need to do different when spooling it? I don't have this issue on my deep sea reels, so I know it's not "that's just how braided line works".
Most new reels hav a rubber insert on the spool to keep Braid from slipping , but a trick I learned many years ago when Braid first came out , use a regular slip knot ,loop it several times around the spool then give it a drop of super glue , let it dry the spool it up.