osm and ersi map providers hang in Qt 5.15.3

It appears that Qt will hang if either of the osm or ersi map providers are used with Qt 5.15.3 on Linux. The same code works OK with Qt 5.15.2. mapboxgl seems to work however. (So perhaps something to do with tiled maps rather than vector?).

While initially seen in another application - This can be reproduced with the Map Viewer (QML) example in Qt creator. Just run it as is with Qt 5.15.3 (For example, on Ubuntu 22.04) and it will hang.

(Changing if (plugins[i] === "osm") to if (plugins[i] === "mapboxgl") in mapviewer.qml will make it work)