I've observed a few issues where claimed changes are made to the POT file when in fact it's merely a reordering of strings. Unsure if this is an issue with order in which files are read from the filesystem, and whether this can be resolved in gettext compiler since it accepts an object (objects should not assume any specific order).

https://github.com/smhg/gettext-parser#data-structure-of-parsed-mopo-files

Since most JavaScript runtimes do respect order of object keys, it may be a matter of ensuring (or resorting) objects to insert strings in predictable order (alphabetical?).