Narrow PR scope to observer tick error isolation; restore synchronous initial render#371

mattcosta7 with Copilot wants to merge 2 commits into

copilot/optimize-relative-time-updategithub/relative-time-element:copilot/optimize-relative-time-updatefrom

copilot/copilotoptimize-relative-time-update-againgithub/relative-time-element:copilot/copilotoptimize-relative-time-update-againCopy head branch name to clipboard