https://stackoverflow.com/questions/60107219/why-in-xcode-11-3-step-overf6-work-as-step-intof7
on updating to Xcode 11.3 while debugging my Step Over(f6) started to behave as Step Into(f7). when i minimised the problem i found out that if I remove '-Wl,-no_function_starts' from 'Other Linker Flags' it again starts to work fine. for more details open above stackoverflow link.