5.5 and 5.5.1 have a critical bug where components on child bps that are placed in a level lose any customized property values in packaged builds. I posted my reply with 100% repro in this thread https://forums.unrealengine.com/t/some-inherited-blueprint-variables-breaks-after-upgrade-to-ue-5-5/2137164/9
Unfortunately this makes 5.5 absolutely unusable for anyone needing to package or ship a game. I’ll try to get a bug report in today but epic needs to fix this ASAP. No legitimate studio can use this version until it’s fixed.