math-tex tag duplicated when placed as innerHTML in customElement.

[BusterLundgaard]

Suppose some content-holding div like "contentHolder" in a custom element has it's innerHTML changed to:

` bla bla bla bla 12313.323 bla bla bla 4. bla bla ba ba:

• bla 10
• bla 5
• bla 7

bla bla bla`

When rendering, it is actually turned into (can be seen in the elements-view):

` bla bla bla bla 12313.32312313.323 bla bla bla 44. bla bla ba ba:

• bla 10 10
• bla 5 5
• bla 77

bla bla bla`

I can't seem to find a way to prevent this. Any idea what's up?