It only "broke part of the table" is part of the design of Parsoid's html -> wt conversion code to eliminate dirty diffs. By design, Parsoid tries to convert only those parts of the page that were edited and leave the rest untouched. The scenario is a bit more nuanced than that (it finds the smallest part of the page that it considers edited which may be a bit larger than what the human editor actually touched), but for all practical purposes, that is a good rule of thumb to remember.

So, in this case, the rest of the table remained unmodified. So, nothing to do for this scenario specifically. If there is, please feel free to reopen and update the task or file a separate task, as appropriate.