As others mentioned this might be down to browser. It's currently targeted for Chrome. It's for this reason we recently switched to desktop clients for the par

As others mentioned this might be down to browser. It's currently targeted for Chrome. It's for this reason we recently switched to desktop clients for the parent project, AFFiNE. To create a more standard experience for all users. As BlockSuite development is currently targeted for AFFiNE, but we hope to resolve many of these browser issues in the future.