Thank you for providing the detailed screenshot. In addition to the recommendations already shared, I suggest running the Surface Repair Tool to check the battery’s charging and discharging behavior, power delivery and reporting accuracy. If possible, run the test while the issue is occurring and save or capture the results before restarting the device.
You can also expand Battery information in the tool and compare the Full charge capacity with the Design capacity. This can help determine whether the battery’s current capacity may be contributing to the behavior.
Additionally, please press Windows key + R, enter winver and share the Windows version and OS build shown. It would also be helpful to know whether this started after a particular Windows or firmware update.
As a separate test, note the current battery percentage, shut down the Surface normally, leave it connected to power for about 30 minutes and then turn it back on. Please let me know whether the battery percentage increased while the device was turned off. This test may help narrow down whether the behavior occurs only while Windows is running.
I hope these additional checks help identify the cause. Please share the diagnostic results, battery information, Windows build and the outcome of the powered-off charging test when convenient.
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