There's a new feature, memory saver, in Chrome browser version 108. This is enabled by default and can affect Communication Panel use.
We recommend disabling this feature with Communication Panel.
Go to Chrome settings > Performance and add Communication Panel URL to the exception sites list.
For more information about the Chrome function, see https://blog.google/products/chrome/new-chrome-features-to-save-battery-and-make-browsing-smoother/.
For information about browser sleep mode, see Accepting calls when browser in sleep mode.