V12.6.4 update, which has a single bugfix - that any object animations that get recolored, where the color is specified to be 0xFFFFFF, end up being invisible. This would most commonly affect one-way arrows.
As usual, you can use the attached update ZIP to update from any version from V12.6.0 onwards, to V12.6.4. (If you're still on V12.4.X or earlier, you'll need a full redownload; see the first post.)