Fold indicators unchanged in preview mode

Steps to reproduce

Use hotkeys or command palette to fold all headings in preview mode

Expected result

The fold indicators change to a right-facing triangle to show that there’s folded content under the header

Actual result

The fold indicator is a downward facing triangle

Environment

windows 10

obsidian version 0.9.11


Additional information

similar behavior at all fold levels

thanks

will be fixed in 0.9.13