I had a live help chat today, https://schoolhouse.world/dashboard/live-help?p=99216, where the learner saw no ability to mark the problem as solved after I finished helping them. In Slack a couple days ago a similar report came in, that a learner could not mark a question as solved, with the button missing from its normal location. And yet other live help requests are marked as solved. Don't know if it is random, or related to some issue with the learner, or varies by learner's age, or a learner's browser or device, or what, but it seems that some live help requests cannot be marked as solved currently.