I'm not sure if anyone has had the same issues, but a few problems have come up since 0.9.5 and 0.9.5.5. Only 2 to report right now, but may add to this thread as we confirm whether other issues are Valheim+ bugs or server-side issues.
New features, as well as changes and fixes from Valheim+ 0.9.5 and 0.9.5.5 still don't show in and cannot be edited from the "Modify Valheim+ Config" section of the Survival Servers Control Panel.
Fireplace fuels running out. I believe this issue was caused by [Fireplace] being changed to [FireSource] in the 0.9.5.5 config files. This GitHub bug report suggests this could be a server-side issue from recycling the old config files.
I'll be sure to cross out these issues as they're resolved and list any necessary client-side actions below