Describe the bug

In some cases, Solid will mysteriously not run effects (not even the initial first run).

Your Example Website or App

https://playground.solidjs.com/anonymous/fdbfd2dd-56ee-49cb-b77e-a615cb8af653

Steps to Reproduce the Bug or Issue

1. write a template with a function as a child in text content
2. read and write a signal in a specific location in the template
3. observe that effect made with createEffect doesn't run, not even initially

Example code:

import { createEffect, createSignal } from "solid-js"
import html from "solid-js/html"
import { render } from "solid-js/web"

export class DrippyScene extends HTMLElement {
  connectedCallback() {
    console.log("connectedCallback")

    // This never logs:
    createEffect(() => console.log(" ####################### EFFECT!"))
  }
}

customElements.define("drippy-scene", DrippyScene)

const [isDesktop, setIsDesktop] = createSignal(false)

render(
  () => html`
    <drippy-scene></drippy-scene>

    ${() => {
      if (!isDesktop()) setIsDesktop(true)
      return ""
    }}

    <div></div>
  `,
  document.querySelector("#app")!,
)

/*

Things you can do to make the effect run:

- comment out the line with if (!isDesktop())

*/

Expected behavior

Expect effects to always run at least once initially.

Ways to make the effect run:

• comment out the line with if (!isDesktop)
• or delete the text content interpolation entirely

Screenshots or Videos

No response

Platform

• OS: macOS
• Browser: Chrome
• Version: 144

Additional context

Here are a few different ways to make it happen:

• https://playground.solidjs.com/anonymous/86d0ecb9-cda4-423a-89b3-cface3d5bea2
  • Ways to make the effect run:
    • comment out the line with if (!isDesktop())
    • or delete the ${} interpolation in the text content altogether
• https://playground.solidjs.com/anonymous/8188dbc6-9fac-4698-a5a9-0a6247a394f4
  • Ways to make the effect run:
    • delete the ${() => ""}
    • or delete the <bottom-sheet></bottom-sheet>
    • or comment out the line with if (!isDesktop())
• https://playground.solidjs.com/anonymous/71db6422-a87c-4bff-b324-57a0effed12a (JSX too)