Seeing lag, only when turning device on.

[flyize]

My Home Assistant version: 2021.6.6

My lovelace configuration method (GUI or yaml): GUI

What I am doing: Turning on a switch.

What I expected to happen: No lag, switch turns on.

What happened instead: UI shows switch turning back off, then coming back on after about 2-3 seconds. This works without issue with a regular Entities card.

Minimal steps to reproduce:

# The least ammount of code possible to reproduce my error
type: entities
entities:
  - type: custom:slider-entity-row
    entity: light.kitchen_overhead_lights
    name: Kitchen Overheads
    toggle: true
# End of code

Error messages from the browser console:

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