v2.19.1: WebGL: INVALID_OPERATION on game start #709

I get the following error repeated 200+ times on game start with v2.19.1:

WebGL: INVALID_OPERATION: drawElements: no buffer is bound to enabled attribute

Traced down to PIXI.WebGLSpriteBatch.renderBatch @ phaser.js:20295

The game remains black (audio and inputs still seem to be working).

I don't have any issues at all with the previous v2.19.0 version.

Any ideas?