I submitted a paper to a journal may 24th and up to july 24th it was with editor. I requested the return of the manuscript to make changes and resubmitted july 26th. It was under review until october 28th. I submitted the revised version on october 31st.

The status changed to required reviews completed on 6th nov then back to under review then to required reviews completed on nov 16, then remained until 29th of nov when it changed to under review. What could be the cause? This timeline is also above the average for all years shown on the journal home page.