Same here, has been in processing for a month, then status has changed back to documents received today, I’m also hoping it means something is happening and it could be moving, however, I feel its more likely they are trying to make timings look better, we sent our old passport which was signed for on 19th April but took them over a month to move it to documents received, the tracking now states 10 weeks they decided to confirm receipt, before I’ll be eligible to upgrade which is passed my holiday date