There shouldn’t be a limit, although if you have 12 sub levels, this is beyond what any standard menu should have. For a large menu groups such as 12 levels, it’s best to switch to mega menu type plugin that let’s you have large and complex menu requirements. I just did a test with a local setup of Encounters and only did 6 levels, but as you can see, they stretch way out to the left, so anything more than 4 levels at most should use a plugin instead….although you will probably lose theme styling.
If you decide to use a plugin, there are many mega menu plugins available out there, both free and paid…the paid ones will (or should) offer full support if you need it, so that is something to consider doing.
Thanks for your help. Somehow, two of the sub levels were linking to bad permalinks. I deleted them from the menu and put new pages back in, and all is well. So, no issues with any limits. Thanks. I’m all set.