There is already a topic in German about the issue: 🇩🇪 FP3 bluetooth problem with Ford SYNC3
Up till now there doesn’t seem to be a solution. But somebody mentioned that also newer Samsung models are affected (https://us.community.samsung.com/t5/Galaxy-S10/Connection-problems-with-ford-sync-3/td-p/777248).
So maybe it’s best to contact Ford and ask them to provide an update/solution.