Short answer, yes, this issue is expected.

That Copal No. 1 is probably between thirty and sixty years old, and in professional service would have been expected to receive a CLA (Clean, Lube, Adjust) service every two to five years. Amateurs like us don't use a shutter anything like as much as a commercial photographer would have done before the digital era, but time can also cause oxidation of lubricants, even surface oxidation of metal parts, so I'd still suggest having a shutter serviced after purchasing unless the seller offers it as "just serviced" or similar, and all function is 100%.

That said, I have a couple old dial-set Compur shutters that are more than 90 years old, and all they needed after I got them was a simple cleaning, a couple micro-drops of light machine oil, and closed back up. Having this done by a professional will cost close to what you paid for the lens and shutter together, but it's also something that an amateur can DIY if you're reasonably handy and confident in working with small parts. Manuals are available to download, with some searching, tool sets are reasonably priced, and there's nothing magical inside the case -- and I have no direct experience with Copals, but most large format shutters avoided "jack in the box" springs; nothing is likely to jump across the room as soon as the last thread on a tiny screw disengages.