in libreoffice the CTRL-C / V is somewhat borked on several machines.
spreadsheet,
CTRL-C on object , object highlighted
arrow down to next field, press ENTER to insert , object is inserted, highlight removed.
all following CTRL-C now inserts an image instead of the values.
but
CTRL-C, press escape to remove the highlight, CTRL-V inserts values.
Here on Gnome CTRL+C/V on Calc copies/pastes formula (or value if text or number is on cell).
Even copying/pasting objects (e.g. graphs) copies/pastes the object, not an image.
So either everything works as intended or we don’t understand what the OP is trying to do.