Agreed, if it happened a few months after the event with Sanders, it could reasonably be said to becthe result of that incident. 5ish years later, very doubtful.
The incident was a big problem.
The blowback from the incident has been well documented.
When you really piss off half of your customers you may be able to stumble along and barely survive for five years. But at some point. because of the incident, a rebrand at the very least may be needed.