On May 8, 2026, independent developer "Bubu" announced the cessation and archiving of the OpenHarmony-NET/OpenHarmony.Avalonia project, which they had been spearheading. This initiative was designed to tailor the cross-platform Avalonia UI framework to the OpenHarmony (HarmonyOS) system, marking a significant effort to merge the .NET ecosystem with that of HarmonyOS. It was widely seen as a vital conduit linking .NET developers to the HarmonyOS ecosystem. The controversy arose from a disagreement over cooperation: In July 2025, officials from Avalonia initiated discussions with Huawei about collaboration, with the promise that "Bubu" would be retained to continue leading the adaptation efforts once the partnership was confirmed. In anticipation, "Bubu" halted public updates and shifted to closed-source development to facilitate technical specification confirmations. However, the collaboration faced repeated delays.

In early 2026, "Bubu" uncovered that Huawei had publicly shared the technical details provided by Avalonia on a bidding platform, ultimately awarding the project to the outsourcing firm Softtek. In May 2026, upon confirming that the outsourcing company had taken over the project, "Bubu" decided to terminate it and issued an announcement on GitHub. This announcement urged future enterprises utilizing the code to adhere to the MIT license and maintain the original author's credit. The incident has ignited extensive debate within China's open-source community and among .NET developers, highlighting the tension between the commercial strategies of large corporations and the safeguarding of rights for grassroots open-source contributors.