Recently I used commit queue to commit some changes. I forgot to squash before I used commit queue. The commit queue ended up committing all 3 commits to mongo (see attached image), without squashing them. Here is the commit queue patch: https://evergreen.mongodb.com/version/5f1098363e8e862a50b1dae4
I believe the validate_commit_message task received all 3 messages concatenated as one: https://evergreen.mongodb.com/task_log_raw/mongodb_mongo_master_commit_queue_validate_commit_message_patch_ee7c632b25d56f2d7c47edeeb3a81ef206f61924_5f1098363e8e862a50b1dae4_20_07_16_18_13_06/0?type=T#L42.