BUG: Merged ROIs not saving in stat.npy in GUI

[yrleftbrain]

Describe the issue:

Merged ROIs (via GUI alt+enter) aren't saving in stat.npy - they only save in the .mat file. Therefore, I can't retrieve the spatial footprints and the indices are likely off in stat.npy. However, the iscell.npy file does update (sometimes).

Reproduce the code example:

in GUI

Error message:

No response

Version information:

v0.14.0

Context for the issue:

If I cannot get the correct spatial footprints, I will not be able to align anatomy to cell activity.

[yrleftbrain]

"imerge" is not being updated in the .mat file either, but "iscell" is.