Splats will render incorrectly for seemingly no reason

This issue has been known about for a while, but apparently nobody's filed a report on GitLab yet. In software mode under (as far as I know) unknown circumstances, splats will break in certain levels. This is most noticeable in Haunted Heights, which consistently breaks splats near the beginning of the stage:

The same issue appears in the Summer ULDC 2021 level pack hub, which uses the OLDC's character switching object. This object was not modified in any way from the OLDC version, but still breaks in the ULDC regardless: