Can a website really ban your IP for a typo or pressing Enter too fast?

It could be an overly aggressive web application firewall or rate limit, though there's no way to tell without seeing its rules. Some filters block requests for suspicious paths, and others count errors or requests over a short window. A typo could produce an error that contributes to a threshold, or it could match a rule more directly.

Pressing Enter quickly might generate repeated requests, but that explanation alone doesn't tell you what the filter actually saw. Ask the site operator for the timestamp, rule that triggered, and how long the block lasts. They should be able to check their security logs and adjust a threshold or make an exception if legitimate use is being caught.

Rate limiting itself isn't weird. Blocking an entire IP for normal use is the frustrating part, especially if other people at work share that public address. I'd document the time and what you were doing when it happened, then send that to the site's support team so they have something specific to investigate.

There may be more than your clicks involved. Some providers flag an IP range because it looks like data center traffic, even when the customer is just using the address their internet provider gave them. Ask whether the block is based on request behavior or IP reputation. Those would need different fixes.

Bot detection can be touchy too. Even a human verification check can lead to a too many requests message if the site's rules are misconfigured. That doesn't prove this is a bot filter, but it's another thing to ask support to check rather than accepting the Enter key explanation at face value.