Thank you for letting us know of this issue and apologies for the inconvenience.
May I know if this happens on Quick Scan or Full Scan? Did you notice on which percent of the scan the Trend Micro program goes away? Also, can you check the version of the Trend Micro program on your PC? To do that, please open your Trend Micro program and click the human icon at the top right and select About the Software.
Lastly, you may try to restart the components of your Trend Micro program from the Diagnostic Toolkit. You may refer to the steps on the link below: