Yes, remember that Wix Pro Gallery is a Wix app and not really suitable for being injected with code as it will have its own code running, so sometimes the Wix app might override your own settings in code etc.
If you want to use a gallery with code, then you are always best to use a normal gallery and not the Wix Pro Gallery app, yes you will lose the additional features from Wix Pro Gallery, however you will have to compromise.
I should have asked at the start if you were using a Wix Pro Gallery as it would have been mentioned much earlier to you, however at least know you know and can correct it for future uses.