What's to say? - she apologised profusely, rather than making up implausible excuses (her eyesight is presumably fine!); and it appeared to be a slip-up of not putting her mask back on when she got up from sitting to standing. Far worse and premedicated "lapses" have been got away with.
I really don't understand her rule on this.
Does the virus not travel horizontally but just in a downward trajectory?
If she sat across a table with others she need not have worn her mask, but because she was standing, according to her decree, she must wear one?
Has she told the COVID virus this? Did it listen?
She broke her own rule, she has apologised.
However, it just proves that it is easy to break the rules and begs the question are they properly thought through?