Hello. You can't edit tables in VE properly for cells with td parameters (multi-span, style, and so on).
For example:
Thank you.
If "it looks fine on edit but saves badly" then it's almost certainly a bug in Parsoid.
Yes, the problem is that reusing the same | chars in ambiguous ways in wikitext makes this a problem.
{|
|-
|a||class='c'|x||y
|-
|a||class='c'|||y
|-
|a||class='c'| ||y
|}So, the middle row parses the "|||y" as a table cell without an attribute .. but "| ||y" parses as 2 table cells.
Anyway, the wikitext serialization code needs to aware of this oddity when it gets an empty cell and insert a dummy white-space char or a dummy comment.