Problem seems to be partially solved, for my part, by switching on the relative classes, I'm sure this was not the case previoulsy. initially I wondered if it was something to do with the level of detail on my symbols, but I do not think that was the problem.
Also having issues with IMAGE on spreadsheet, updated a file with IMAGE working well, had to update the symbols and recalculated, all images disappear. Would seem to be a bug in 2019.
Quick help required.