4 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Worth checking
Firmware update on MatePad 11 reportedly loses sound and battery autonomy
A buyer review on Technodom for the MatePad 11 (Debussy-W09CS).
What to check. An owner warns not to update past firmware 2.0.0.221 because the update degrades sound and battery life; another reports installed apps disappearing on their own. Treat OS updates as risky and keep backups.
MatePad 11 Bluetooth keyboard drops connection when detached from the tablet
A Turkish owner on the DonanımHaber MatePad 11 (HarmonyOS) owner thread.
What to check. A Turkish owner reports the official keyboard case drops its Bluetooth link shortly after being detached from the tablet, and that resets (network reset, re-pair, reboot) did not fix it. Relevant to TR buyers using the keyboard case.
MatePad 11 OS updates are inconsistent and newer HarmonyOS versions break some apps
A GSMarena user review comparing MatePad 11 (2021) and (2023).
What to check. Owners report inconsistent OS updates and that moving to newer HarmonyOS versions can break preinstalled Huawei apps (e.g. WPS PC Software Engine) because the OS is based on older Android. Check app compatibility before updating.
MatePad 11 battery drains fast even at 99% max capacity; one owner stopped using it
Kakaku.com (価格.com) owner forum thread 'バッテリーの消費' for the MatePad 11.
What to check. Owners report heavy battery consumption even with battery health at 99%, with background apps restarting after screen-on; one owner says the tablet became unusable. Expect short battery life and check battery health before buying used.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Tablets catalog, version 0.1.1, under the CC-BY-SA-4.0 license.