Table options, Cell options and Table & Cell styles behaving badly… bug?
I'm setting up a template to use for a document and when I get the final copy I need to apply styles and layout quickly to get job done on time.
One issue is copying cell text from one table or external source into a table, there's no way I can find to do it so it retains the existing cell formatting. "Edit Menu" > "Paste without Formatting" is not an option. So I need styles that I can apply and that work first time every time. It's the opposite of what I have happening. Even using the manual Table Options from the Table palette before I save as styles the attributes are applying to the table but for some reason (or unreason) certain cells, seemingly cells at random, will choose to be missing the fill colours, or have the wrong border stroke colour.
When I make changes like Table Options> Alternating Fills… it will effect most of the cells but always some cells in this table choose to not have any fill. Sometimes it's entire first two rows under header row and a few cells in the third row but not all of them. Sometimes its just a few cells in the first two rows. The only way I can get it how it should be is select the non-filled cells and in the toolbar change to fill colour and override the Table Option styling. I can't be doing that all the time when I set or edit styles. This is frustrating. I've copied the table into a doc so others can try for yourselves and see if same problems exist in copy.
Another thing is when you skip first & last rows using Table Options> Alternating Fills… they should get the Alternate fill colour and tint, not just be left white. I'm finding often the skip first rows get left paper colour when I apply new fill Alternate Fill colours. and occasionally the last ones but not as often. I'm just playing with settings to try and jig InDesign into doing it right as per the inputs.

Now I've manually fixed those 6 white cells with 30% tint of the fill colour so it looks as it should.

Now I'm copy and pasting some of the cells in column one from lower down to column one cells in the top 5 rows… this upsets formatting again in cells that haven't been manually corrected with overrides.

Now I'm editing the Table Options… Alternating Fills…. notice cell A2 is darker than the others in row 2.

Skip 5 rows…
This is just one dimension of the weirdness I'm experiencing with Table Options and Styles not working as I think they are supposed to. I'm seeing much crazier stuff going on with other tables, but I have to depersonalise all the text to do screen shots or link a file, and its a hassle. I'm trying to remove all extraneous styles so there are no conflicts between cell styles and the alternating row fills of the Table Option/style. In the above example I think I have done that. It's not always possible though to have no cell style, I need it to do headers and normal rows.
Footnote:
I recall there were bugs in INDD 2015 to do with Tables in large documents, so bad that simply having tables in large documents would start corrupting the document in some cases, once this happened to me on an urgent document I'd been preparing for weeks and waiting for final edits from client. The bug had the effect IIRC of removing text and freezing up the UI in unrelated parts of the document. (This was confirmed by Adobe to me over the phone as a known issue after 48 hours of me complaining on their chat lines, their only solution was to save the document as an .imdl files and revert to using INDD 2014).
