Citation styles are not consistent if using different method to insert the reference.
(1) in Google Docs, if I press ctr+alt+P, search multiple references, and add all these citations, the citation styles will be in the following form
" solid components [2, 11, 15-18] " .
(2) If I press ctr+alt+P at the same location in the document multiple times, and search and add citation of one reference each time, I will get
" materials  " .
And the paperpile extension will not able to convert style (2) to " materials [10, 13-15] ", which is consistent with style (1) .
While, EndNote can automatically make the citation style consistent.
is there any way to fix this problem ? Otherwise, I have to manually revise the citations…