Yep, that is normal. You need a
generator bonding plug.
You may either buy one or make your own. Making your own is simple, just install a jumper wire inside the plug connecting the silver/ground and green/neutral screws. Then plug it into your genset receptacle.
When on shore power or a built-in generator this is automatic, but not for a stand-alone generator.
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2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA.
" My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy