I recall having seen a not dissimilar problem a while ago whilst on a client site - in attempting to narrow the problem down to the smallest subset of code in which the problem manifested itself, much to my consternation, the problem disappeared.

AFAIR, further experimentation led to the conclusion that the problem was down to the incestuous/circular inclusion of, sometimes ,not too well written bespoke/custom libraries.

Question is, have you attempted anything similar ... with either a) similar or b) different results ?

If it's the latter, could you let us have a look at the minimal code that demonstrates the problem.

BTW, what happens/do you see when/if you attempt to compile your script from the command line i.e. can we rule out/focus on any influence that the IDE may be exerting ?

Update:

Added afterthought.