Part 107 UAS pilot reported briefly flying above their LAANC authorized altitude.

Narrative

I was the Remote Pilot in Command for this flight. I was flying roughly 4.4 miles north of South Bend International airport. I was conducting a map plan flight in Drone Deploy (version mobile 5.31.0) to collect boundary information for our contractor. The flight was conducted with a Unmanned Aerial Vehicle. The flight was conducted in Class C airspace; but I had submitted a LAANC request that satisfied the FAA requirements. My flight was mostly done; and I was waiting for the battery to hit a low enough point to trigger the Return to Home and end the flight as I had previously captured the area I was flying and wanted more overlapping pictures. I had planned to assume manual control using the Drone Deploy manual flight trigger within the app. I heard the Return to Home beep activate-indicating the drone was beginning its ascent to return to home altitude-350 feet is what we had set it to previously and I did not change it. I did not recognize that Drone Deploy's manual takeover does not overwrite the Return to Home flight and noticed quickly that the UAV was ascending past my LAANC max altitude. After a couple of seconds of figuring out a plan I remembered to turn the controller to Sport mode; which instantly stopped the Return to Home flight and the UAV-which had climbed to approximately 334 feet Above Ground Level according to the flight log. Once manual control was initiated; I dropped the UAV to below 200 feet and took it home and landed it. Had I not decided to wait for Return to Home to trigger or had changed the Return to Home altitude; I could have avoided this situation. In the future; when myself or other pilots I interact with conduct a LAANC based flight we will change the Return to Home altitude to slightly below the max altitude allowed in our LAANC request.