My map on Tidal freezes when baking the lights in Forge and doesn’t even load in Custom games. Everything is within budget with the lighting at exactly 100%. Colors are default too and no lights, just building blocks. The spawns and stuff were left alone as default as well. Tidal is broken and needs a serious fix.
I tested the map on a different console and it still freezes. Saving over it with a different account didn’t fix it either. Tidal has to be the problem. The map is named A9C in my files if any devs want to test it out.
I have had the same problem and I have tried reseting all my spawn points, opening the map on another console, and having my friends join me while in the black loading screen glitch but to no avail. I believe the only way for this to be fixed is with an update by 343. I am seriously disappointed for 343 making a ocean map (I love the ocean theme) but making it so glitchy that you can only play in forge and if you bake lights or try to load in custom games it freezes. I have also tried renaming my map with no numbers and with numbers but it didn’t work 
I guess we will have to wait
You’ll be happy to know that this issue should now be addressed in the latest hotfix 
https://www.halowaypoint.com/en-us/news/7-15-16-halo-5-hotfix
Thank God, I wasn’t the only person experiencing this