All Physics objects disappear in game mode in 4.21

I’ve not yet been able to pin down why all physics objects (objects with “simulate physics” set to True) disappear in game mode since updating to 4.21.

This seems to be map specific as the default map (which consists of only a box brush) in the project has no issues.

I have checked world settings are the same for both maps and have made sure collision on all relevant surfaces are the same.

Any advice would be much appreciated

Hello,

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Thanks