RMMV - Galv's Message Busts plugin flickering

This bug happens with Galv's Message Bust plugin's latest version, and only when switching from the default text frame with a type of window background setting ("Dim" in my case) and the plugin's

Message Busts - DK Plugins

Galv's Message Busts, Page 3

RPG Maker MV Tutorial: Bust Graphics in Messages

Talking Character Busts!

RMMV - Change to Galv's Message Busts (MV)

RPG Maker MV Tutorial: Bust Graphics in Messages

MV Audio/Visual Effects Galv's RPG Maker Scripts & Plugins

MV Bust Menu Galv's RPG Maker Scripts & Plugins

Galv's Message Busts