It's not a bug. It's a feature. Expect that also if elected president.
WaPo reports here:
Rubio did not give the job the attention that legislative leaders expected. He skipped nearly half of the meetings over the first five months of the panel’s existence, more than any of his colleagues, according to Florida legislature records. He missed hours of expert testimony and was absent for more than 20 votes — prompting the state House speaker who had given him the assignment to express concern, the committee’s chairman said.