Warden does not pathfind over "danger" correctly in Bedrock.

In Java edition the warden will path over magma and cacti to reach you, but in bedrock it will actively avoid them. If there is no other route to you around the cacti or magma it will not walk onto them, and will instead just stand there until it decides to sonic boom.

It does path through lava, powdered snow, and water in both versions.

(I tested this on an unmodded version of Java, and a bedrock world with no addons)