Repro:
1. Select Morphling and morph Batrider or Winter Wyvern.
2. Cast the flying ability and get closer to mines.

Result:
Morphling not only trigger mines but also get damage by them.

Expected:
Morphling should neither trigger them nor get damaged. Because on the original spell, caster won't trigger them and get damaged, even get stolen by Rubick (in Firefly case).