The original statement, as phrased by their engineers, probably was something like “Our latest firmware regularly crashes your system, triggering reboots” (plus a few paragraphs with a highly detailed description of why that happened that only the engineers who wrote the firmware would understand)

This is what they ended up with after a few reviews with legal (“we can’t say ‘our’; they’ll eat us in court”) and marketing (“We need a less emotionally loaded way to say ‘crash’”)

Legal aimed to maintain just enough meaning in the statement to be able to say “we warned customers as soon as we could”; marketing aimed to make it a positive message. I guess that’s why ‘higher’ won over ‘more’.

Means whoever typed that can't write.

As in more reboots than they had been experiencing before applying the updates

more frequent