GSK critical assertion error spam with GTK4

When using any Plata theme variation on an app that uses GTK4, the following errors are spammed to the console:

(gtk4-demo:58220): Gsk-CRITICAL **: 22:32:36.806: gsk_radial_gradient_node_new: assertion 'color_stops[i].offset >= color_stops[i - 1].offset' failed

(gtk4-demo:58220): Gsk-CRITICAL **: 22:32:36.807: gsk_render_node_ref: assertion 'GSK_IS_RENDER_NODE (node)' failed

(gtk4-demo:58220): Gsk-CRITICAL **: 22:32:36.807: gsk_render_node_unref: assertion 'GSK_IS_RENDER_NODE (node)' failed

These do not have an obvious impact on theme functionality.

Reproduction

This can be reproduced with gtk4-demo, a demo application provided by the GTK devs to show off various GTK features. Other apps, like gtk4-demo-application and custom GTK4 apps, can also reproduce these error messages. The Dark Theme setting does not affect these messages, nor does the selected Plata variation.