Not that I can see. I also checked the devices they were using as we have been having some issues with safari (not that unusual), but they are using varied devices (pc, mac, tablet,etc).
I assume, like you said, that there is something somewhere that WeBWorK is trying to send to Canvas for these particular students that is strange. A new wrinkle is that it has suddenly fixed itself for one student, and they claim they have done nothing different. I am attempting to get all of them to log in from chrome and check the log to see if something looks strange with $debug_lti_parameters as I have not caught them logging in yet in the log file.
I assume, like you said, that there is something somewhere that WeBWorK is trying to send to Canvas for these particular students that is strange. A new wrinkle is that it has suddenly fixed itself for one student, and they claim they have done nothing different. I am attempting to get all of them to log in from chrome and check the log to see if something looks strange with $debug_lti_parameters as I have not caught them logging in yet in the log file.