Shikabashi I'm sorry to hear you're having trouble. I'm afraid I can't tell what is supposed to be the correct state from the screenshot of the problem, so could you also show us a picture of what the correct display state should be? Also, can you confirm that the End slot setting is correct?

Shikabashi Thank you for the clarification! I've confirmed that I can reproduce the issue and have created an issue here to fix it: EsotericSoftware/spine-editor874
We apologize for the inconvenience, but please wait until we have resolved this issue.

Shikabashi Are you referring to the ability to snap to pixels? If so, this is one of the features we've been wanting to add for a while, and here's the issue ticket:
EsotericSoftware/spine-editor554

As described in the issue comments, a snap function is already available for region attachments. Enabling `Pixels' will round the X/Y coordinates of the region attachment to the nearest integer, either 0 or 5.