We recently released firmware version 1.8.10 for the TCC2 which should help with beam freezing during long term operation with camera system tracking.
This update is now available within the Control Cockpit. Select your TCC2, and navigate to the Device tab where you can update your unit to this latest version.
If you wish to download and update the manually update the firmware, the download link can be found here.
Please also ensure that all DSP hardware and any Automatic Camera Preset Recall and control plugins are up to date as well for optimal performance.