When "Simple check" item returning float type (e. g. ssh_perf) is configured as "Numeric (unsigned)" it will not complain but instead just convert the value to numeric unsigned. On the other hand an Agent item returning float (e. g. net.tcp.service.perf[ssh]) when set as "Numeric (unsigned)" will get error about incompatible return value type and will be set UNSUPPORTED.

This is an inconsistency issue, Simple check items should act the same way as Agent does.