Both the rubberbanding and the instadeath issue will be addressed in an upcoming hotfix, which should be released within the next week, apologies for the inconvenience caused.
Setting yourself as admin at the beginning of every singleplayer sessions should help in dealing with the instant death.
Regarding the rubberbanding, a few workarounds have been shared to free the character from the initial rubberbanding, such as rolling and opening your inventory: