The new Bedrock update is currently facing a critical issue where certain blocks can trigger crashing the bedrock client. The GeyserMC team are working their best on addressing this bug and while there's no concrete ETA provided, given the bug's severity, we anticipate a resolution within a few days to a week. We'll post an updated announcement as soon as this bug is fixed.
Update: We've just pushed an update that should alleviate the crashing issues for most Bedrock players. Please try connecting to the server and check if you're able to join successfully.
Thank you for your understanding and patience!