We upgraded our setups to STC 4.96 this year and the Python HLTAPI 4.52 function calls occassionaly (intermittent, not 100% reproducible) started to return an empty (just Null) result instead of a dictionary.
Most often it is
emulation_ospf_config with session OSPFv3
emulation_bgp_config with ipversion IPv6
while the exact same calls with OSPFv2 and IPv4 always work.
Would anynone know what is the problem please ?? (it never happened with STC 4.75)