First, I never cover anything on the bike when parked at work. Sits in the sun all day. Very high UV environment. No issues.
Second, this is a design flaw and should be covered by warranty. The car companies ignored the souwthwest environment for years until they had to start repairing finishes and interiors that failed out here. Now all the major mgs have proving grounds in the desert southwest to assist in the design process. Honda is one who does have a southwest US facility. So, why have a motorcycle that can't be left out in the direct sun for 14 hrs, in any orientation?
Do not let this go if it happens to you. Take the bike back to the dealer and make a claim on it. Even if outside the normal warranty period you should make the claim and force the "system" to see that there is a design flaw. Pre-existing damage probably occurred within the warranty period.
I say this because we had many arguments with Honda engineers over their inadequate designs. They were famous for insisting that the parts don't fail in Japan so it must be because of the owner that the part failed.
