Does 2025r1 break WindowsPipeMBS?

I have a desktop app here using some older interactive console helper classes, and for communication with Windows I used WindowsPipeMBS.

I have now noticed that when compiling the helper with Xojo 2025r1.1, communication will be broken. The desktop app still fires the Connected event, but neither commands sent to the helper nor those from it are received by either side anymore.

Once I recompile the helper with 2024r3.1, with the same set of plugins, they are back to life again.
Anyone else seeing this?