I have noticed this with zombies only, as I did not want to try with creepers and could find no drowned or skeletons. My bridges are made into an arch shape with bottom half slabs near the center. Zombies began following me across the bridge until they reached these slabs and then lost interest in me, unable to follow. This does not negatively affect me currently, but it seems like a bug so I thought I should report it.
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[Mod] OcelotOnesie
migrated
Thank you for your report!
We're actually already tracking this issue at MCPE-47075, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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