Hover over product image sudenly messed up

Hello everyone, i am new here and i am not a professional coder, just working on my private poster selling site. After almost finishing my platform and my design , uploading many of my works, and getting closer to launching it, tonight, all of a suden, the hover over my product images in the product gallery started behaving very weird. Untill now, on product image hover, second image in the gallery would always get picked up automaticly. I based a big part of my design on that thing, more precisely i used transparent images, that on hover would allow, for the site background to appear making for a pleasent visually effect. Tonight all of a sudden (didn't add any new CSS code in days) instead of second picture in the gallery, last one would get picked on hover. Not only that, but it seems it kind of shows all overlapping images in bacwards. So if i put a transparent image on last position, on hover i would see that, and the one before it. I tried to remove all CSS code just to check if i messed anything up, but the problem persists, so it is not that. Anyway, this is my site https://tambourine-seahorse-f8ky.squarespace.com/config/pages/645e0ddeec0e6f0bfba508b1, or www.inyadrims.com. Please help, i am loosing it here. Thank you all. 

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Is it possible, that some internal revision on squarespace part may have caused this perhaps?

Possible yes. SS is making changes all the time. Sometimes things don't go as planned.

Equally as possible is something happening outside of SS.

The internet is a complex system and is prone to errors.

If something is happening out of the ordinary I suggest waiting a bit to see if the abnormality clears.

In the meantime restart your browser, computer, routers/hubs, and etc. to get a fresh start on your end.

If the issue persists, ask questions here. Ultimately if you think it is an SS issue, contact customer support. 

Thank you for your response. One thing i would add though, before posting, i have reseted browsers and pc's several times, but then again, i shoulld have probably waited a bit longer see how things go down before posting, guess panic kind of took me over. Thank you again, prompt response, cheers!