Unable to delete milestone - Bulk functionality

[drasticdpk]

Reference
https://monosnap.com/file/OcDCVanRICd87tnVq6rMPMPNByvOJr

Note : Sometimes I can delete upto 5 milestone successfully.

[drasticdpk]

Finding :

[drasticdpk]

Before

After bulk delete

[drasticdpk]

Unable to delete bulk milestone.

[drasticdpk]

Verified