Mermaid sequence diagram arrow heads don't show up in split view

[bobbelz]

Steps to reproduce

1. Use the following mermaid sequence diagram:

sequenceDiagram
	participant User
	participant Service
	User ->> Service: yo do dis ding
	Service-->>User: gotshu
	User -->> Service: wassupp

1. Toggle to Preview, notice the arrowheads are displaying
2. Toggle back to Edit, then open Preview to the side
3. Notice the arrowheads are gone

Expected result

To see the arrowheads in the preview even with split mode.

Actual result

Arrowheads are not displayed.

Environment

• Operating system: Win 10
• Obsidian version: 0.12.12

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Additional information

In split view:

With only Preview on:

While the screenshot is with custom CSS, I tried also without and it had no effect.