Unable to change transparency on TileOverlay on Android

I'm migrating from the kefahB/nativescript-google-maps plugin to @nativescript/google-maps.
My app animates weather radar by composing an array of TileOverlays and then iteratively changing the TileOverlay's transparency to hide one overlay and display the next.

While transparency can be specified in the TileOverlayOptions when creating a TileOverlay, it can't be modified directly afterwards. Instead, you have to use native methods, such as on iOS:

tileOverlay.native.opacity = 1.0;  // display tileOverlay

On Android, there's:

tileOverlay.native.setTransparency(0.0);  // display tileOverlay

But this seems to have no effect. I can see in the debugger and via tileOverlay.native.getTransparency() that the native TileOverlay's transparency property has indeed been changed, but there is no change in the display.

Beginne bei der über tileOverlay.native bereitgestellten Android-TileOverlay-Implementierung und verfolge setTransparency zusammen mit transparency in TileOverlayOptions. Reproduziere die Aktualisierung des Radar-Overlays unter Android und überprüfe, dass eine Änderung von transparency nach der Erstellung das gerenderte Overlay ändert.