Hi @Michael Clark ,
Do you mean this issue occurs after you updating canvas app?
Do you mean you want to change the ways of clearing client cache file?
As a workaround, you could try to uninstall Teams client and reinstall it to see if it works for you.
At the moment, Microsoft does not have a way to clear the local cache in Microsoft Teams client. On the Microsoft Teams UserVoice, users have requested an option to clear the cache on Microsoft Teams from within the graphical user interface (GUI). If it meets your requirements, you could vote for it here. Microsoft will always focus on customer’s feedback and experience, some new features would be added to the services based on customers' feedback in the future, and your good ideas will be very helpful for them to improve the service.
Your time, understanding and cooperation will be highly appreciated.
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