Motion votes and elections can easily run simultaneously and over several days in OpenSlides.
After the votes or elections are started, the bar is displayed to the assembly members (after login) in the upper browser area, which then also contains the number of open votes. If you add "/polls" to the URL (e.g. demo.openslides.org/polls), you will be taken directly to the overview with all pending motions/elections.
This state is also server restart-proof; every vote is safely written into the database.