You are likely to annoy many of your customers even further.

Including the word 'may' shifts the sentence from apologising for causing actual inconvenience, to apologising for causing a minor risk of possible inconvenience, which is not what you are trying to convey after selling someone something for a lot of money and then remotely breaking it at no notice.

In many customers, it is likely to elicit a response something along the lines of:

"Any inconvenience this may be causing? I'll give them may be causing. The fucking thing won't boot. May be fucking causing. I wasn't using the damn thing as a doorstop."