[BUG] Moving a Mount While Both Mount and Mounter are Selected Breaks Alignment

[Sniperfox47]

Describe the bug
A clear and concise description of what the bug is.
If you move a mount and the token mounting it at the same time by having both selected it breaks the alignment and the smaller token drifts around inside the larger one. In my experience it typically drifts to the upper left corner.

Environment Details
Foundry VTT Version: 0.6.1
Mount Up! Version: 3.0.1

To Reproduce
Steps to reproduce the behavior:
_1. Mount one token on another
2. With both still selected move the tokens
3. Move them several more times and they shift around on top of each other. Typically drifting to the top left. It's especially noticable with center alaignment.

Expected behavior
They should stay locked to the set alignment.

Screenshots
If applicable, add screenshots to help explain your problem.
Before moving:

After moving:

[jaltepeter]

So after some investigation, this is not related to Mount Up, but actually the way Foundry handles token placement. If shift is not held during token movement, a token will snap into the closest grid spot.

Since you are 'controlling' a token that is selected, Foundry movement rules take over. At current, I can only suggest a 'workaround' of only selecting the mount token like normal mount movements.

I will continue to do some investigation and see if I can hack around it in the future.

See example with one token:

Here is two tokens stacked, but not mounted in any way:

[winterwulf]

This doesnt happen with the old version of the module, I have reinstalled it manually and it works perfect.

https://i.imgur.com/HCmC5NU.gif