Element ordering after rerender is wrong sometimes

Hi, I have seen a bug that is happening in weird places that the order of items rendered gets switched up I have code similar to:

<div>
 {logic && <div>...</div>}
 {!logic && <h1>...</h1>}
 <Wrapper>...</Wrapper>
</div>

when it renders first time its fine but if it rerenders with the logic changed it sometimes reverses the order of the 2 items that come out, this is really difficult to reproduce, was trying yesterday but could not come up with anything

This happens in many places, sometimes a form field gets pushed down or modal title ends up at the bottom etc.

I will try again today to have a repro of this problem

[developit]

Fix is up as preact@beta (preact@5.0.0-beta7). Thanks again!

[aeosynth]

test case: https://jsfiddle.net/p16ea27s/