Custom playbooks randomly starts missing formations

I started with a generic playbook and I will add formations and plays as I find personnel mismatches etc then I just save that same playbook. I’ve noticed recently that the playbook has just randomly removed 3 of my formations. I go into the custom playbook editor to make sure I’m not going crazy and they’re all there. Check my save playbook option again as it’s my only file in the playbook section and then go into practice again and the formations are gone. Anyone else have this happening to them and know how to fix it?