[iOS][Fabric][Bridgeless] 0.86 Release-only boot hang: first commit of a react-navigation Tabs tree never mounts - all threads idle in mach_msg, JS event loop alive, no JS error

[iOS][Fabric][Bridgeless] 0.86 Release-only boot hang: first commit of a react-navigation Tabs tree never mounts - all threads idle in mach_msg, JS event loop alive, no JS error #279